Crypto Glossary — Every Term Explained

5

51% Attack

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An attack where a group gains control of more than 50% of a blockchain network hash rate or stake, allowing them to rewrite recent transactions or double spend.

A 51% attack on Bitcoin would require controlling more computing power than the rest of the network combined, costing billions of dollars and making it practically impossible.

A

Address

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A unique string of letters and numbers that identifies a location on a blockchain where cryptocurrency can be sent or received. Like an email address, but for money.

A Bitcoin address looks like: 1A1zP1eP5QGefi2DMPTfTL5SLmv7Divf N. You share it freely to receive funds.

Airdrop

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A distribution of free cryptocurrency tokens to multiple wallet addresses, usually as a marketing strategy, reward for early users, or part of a project launch.

Uniswap airdropped 400 UNI tokens (worth thousands of dollars) to everyone who had used the protocol before September 2020.

All-Time High

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The highest price a cryptocurrency has ever reached. Commonly abbreviated as ATH.

Bitcoin set an all-time high of over $109,000 in January 2025. Many investors use ATH as a reference point for market sentiment.

All-Time Low

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The lowest price a cryptocurrency has ever traded at. Abbreviated ATL. Usually occurred shortly after launch or during a severe market crash.

After the 2022 crypto crash, many altcoins hit all-time lows, down 95% or more from their ATH.

Altcoin

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Any cryptocurrency that is not Bitcoin. The term comes from "alternative coin." There are thousands of altcoins with varying use cases and levels of legitimacy.

Ethereum, Solana, and Cardano are all altcoins.

AML

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Anti-Money Laundering. Legal requirements that exchanges and financial services must follow to prevent their platforms being used to launder illegally obtained funds.

Regulated exchanges are required to report suspicious transactions and large cash movements to financial authorities as part of AML compliance alongside KYC.

AMM

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Automated Market Maker. A type of decentralized exchange protocol that uses mathematical formulas to price assets in a liquidity pool instead of using an order book.

Uniswap is the most well-known AMM. Instead of matching buyers and sellers, it uses pools of tokens and a constant product formula (x * y = k).

APR

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Annual Percentage Rate. The simple yearly interest rate on an investment without accounting for compounding. Lower than APY for the same underlying rate.

A lending protocol advertising 10% APR pays that rate linearly without compounding, whereas 10% APY compounds and pays slightly more over time.

APY

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Annual Percentage Yield. The real rate of return on an investment over one year, accounting for compounding interest. Higher APY means your money grows faster.

A DeFi protocol offering 12% APY means that $1,000 deposited today would grow to approximately $1,120 after one year with compounding.

Arbitrage

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The practice of simultaneously buying an asset on one exchange where it is cheaper and selling it on another where it is more expensive, profiting from the price difference.

If Bitcoin trades at $60,000 on Exchange A and $60,200 on Exchange B, an arbitrageur buys on A and sells on B, pocketing $200 minus fees.

B

Bag Holder

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An investor left holding a cryptocurrency that has dropped significantly in value, hoping it will eventually recover rather than selling at a loss.

After the 2021 bull run, thousands of bag holders sat on altcoins down 95% from their ATH, waiting years for a recovery that may never fully come.

Bear Market

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A prolonged period of falling cryptocurrency prices, typically defined as a decline of 20% or more from recent highs. Characterized by negative sentiment and low trading volume.

The 2022 crypto bear market saw Bitcoin fall from $69,000 to under $16,000. Many altcoins lost 90-95% of their value.

Bitcoin

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The first cryptocurrency, created in 2009 by the pseudonymous Satoshi Nakamoto. A decentralized digital currency with a fixed supply of 21 million coins.

When Bitcoin hit $100,000, it had taken 15 years from its first transaction in 2009.

Block

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A container of transaction data on a blockchain. Each block holds a batch of verified transactions, a timestamp, and a reference to the previous block, forming a chain.

On Bitcoin, a new block is added approximately every 10 minutes, containing around 2,000-3,000 transactions.

Block Explorer

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A website or tool that lets anyone view all transactions, blocks, wallet balances, and activity on a blockchain in real time. The blockchain equivalent of a public ledger you can search.

Etherscan.io lets you search any Ethereum address or transaction hash and see exactly what happened, when, and how much was paid in gas fees.

Block Height

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The number of blocks that have been confirmed on a blockchain since the very first block (genesis block). A measure of how far the chain has progressed.

As of early 2025, Bitcoin block height exceeded 880,000, meaning over 880,000 blocks have been mined since January 2009.

Block Reward

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The amount of new cryptocurrency given to miners or validators as compensation for successfully adding a new block to the blockchain. On Bitcoin this is newly created BTC plus transaction fees.

After the 2024 Bitcoin halving, the block reward dropped from 6.25 BTC to 3.125 BTC per block.

Blockchain

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A distributed ledger where transactions are recorded in chronological blocks, each cryptographically linked to the previous one. No single party controls it.

Bitcoin uses a blockchain to record every transaction ever made with no central bank required.

Bridge

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A protocol that allows users to move cryptocurrency or data between two different blockchains. Bridges lock tokens on one chain and mint equivalent tokens on another.

To move ETH from Ethereum to Arbitrum, you use a bridge. The ETH is locked on Ethereum and wrapped ETH is minted on Arbitrum for you to use.

Bull Market

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A period of rising cryptocurrency prices and positive market sentiment, typically defined as an increase of 20% or more. Characterized by high trading volumes and optimism.

The 2020-2021 bull market saw Bitcoin rise from $3,800 to nearly $69,000 in under two years, with many altcoins posting even larger percentage gains.

C

CBDC

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Central Bank Digital Currency. A digital form of a national currency issued and controlled by a central bank. The government-controlled opposite of decentralized crypto.

China's digital yuan is the largest CBDC in deployment. Unlike Bitcoin, it is fully controlled by the Chinese government, which can freeze accounts or track every transaction.

CEX

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Centralized Exchange. A cryptocurrency exchange that is operated by a company, holds customer funds in custody, and matches buy and sell orders through its own order book.

Coinbase and Binance are the largest CEXs. You create an account, verify your identity, deposit funds, and trade. The exchange controls your keys.

Chainlink

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The leading decentralized oracle network that provides real-world data to smart contracts. LINK is its native token.

Chainlink provides ETH/USD price feeds to hundreds of DeFi protocols. Without reliable oracles like Chainlink, lending protocols would not know when to trigger liquidations.

Coin

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A cryptocurrency that is native to its own blockchain. Distinct from a token, which is built on top of another chain. Coins are used to pay for transactions on their network.

Bitcoin (BTC) is a coin native to the Bitcoin blockchain. ETH is a coin native to Ethereum. They are not built on another chain, they are the base currency of their own.

Cold Storage

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Keeping your cryptocurrency private keys on a device or medium that is completely offline and never connected to the internet. Considered the most secure storage method.

A hardware wallet like a Ledger kept in a safe deposit box is cold storage. Even if someone hacks your computer, they cannot reach your funds.

Collateral

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An asset pledged as security when taking out a crypto loan. If the value of your collateral falls too much, the protocol can sell it to repay the debt.

To borrow $500 worth of USDC on Aave, you might need to deposit $750 worth of ETH as collateral. The ETH is returned when you repay the loan.

Confirmation

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Each new block added to the blockchain after your transaction is included counts as one confirmation. More confirmations mean higher certainty that your transaction is permanent.

Bitcoin exchanges often require 3-6 confirmations before crediting your deposit. At one block per 10 minutes, 6 confirmations takes about an hour.

Consensus Mechanism

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The method by which a blockchain network agrees on the state of the ledger. The two main types are Proof of Work and Proof of Stake.

Bitcoin uses Proof of Work; Ethereum switched to Proof of Stake in 2022.

Correction

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A temporary price decline of 10% or more from a recent high. Corrections are normal and healthy parts of any market cycle, distinct from a full bear market.

During the 2021 bull run, Bitcoin went through several 30-40% corrections before recovering and reaching new all-time highs.

Cross-Chain

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The ability for different blockchains to communicate, share data, or transfer assets between each other. A major goal of blockchain interoperability.

A cross-chain protocol lets you use your Bitcoin as collateral on an Ethereum-based lending platform without selling it first.

Custodial

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A wallet or exchange where a third party holds your private keys on your behalf. You trust that company to keep your funds safe. Opposite of non-custodial.

When you leave crypto on Coinbase, you are using a custodial service. Coinbase controls the keys. If they are hacked, your funds are at risk.

D

DAO

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Decentralized Autonomous Organization. An organization governed by smart contracts and token holders rather than a board of directors. Members vote on proposals using governance tokens.

Uniswap is governed by a DAO. Anyone holding UNI tokens can propose and vote on changes to the protocol, from fee structures to new features.

dApp

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Decentralized Application. A software application that runs on a blockchain or peer-to-peer network rather than being hosted on centralized servers. The backend logic lives in smart contracts.

Uniswap, Compound, and OpenSea are all dApps. You interact with them using a Web3 wallet, and no company can shut them down by pulling a server.

Decentralization

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The distribution of control and decision-making across a network rather than being controlled by a single entity. A core principle of blockchain technology.

Bitcoin has thousands of nodes and miners across dozens of countries. No government, company, or person controls it. That is decentralization in practice.

DeFi

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Decentralized Finance. Financial services lending, borrowing, trading built on blockchain networks without banks or intermediaries.

On a DeFi platform like Aave, you can lend your ETH and earn interest with no bank involved.

DEX

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Decentralized Exchange. A cryptocurrency exchange that operates without a central authority, using smart contracts and liquidity pools to enable peer-to-peer trading.

On Uniswap (a DEX), you connect your wallet and trade directly from it. No account needed, no KYC, no company holding your funds.

Diamond Hands

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Slang for holding a cryptocurrency investment through extreme volatility without selling, no matter how much the price drops.

Diamond hands holders kept their Bitcoin through the 80% crash in 2018 and were eventually rewarded when prices recovered and exceeded previous highs.

Dollar Cost Averaging

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An investment strategy where you invest a fixed amount of money at regular intervals regardless of the price. Reduces the impact of volatility on your average purchase price.

Buying $100 of Bitcoin every Monday regardless of price means you automatically buy more when prices are low and less when prices are high, lowering your average cost over time.

Double Spend

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An attack where someone tries to spend the same cryptocurrency twice. Blockchains are specifically designed to make double spending computationally impossible under normal conditions.

The 51% Attack is the main theoretical way to double spend on a blockchain. Bitcoin has never been successfully double spent since its launch in 2009.

DYOR

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Do Your Own Research. A reminder in the crypto community to independently verify information before investing, rather than relying on tips from influencers or social media.

Before buying any token, DYOR: read the whitepaper, check the team, look at tokenomics, and verify the smart contract has been audited.

E

ERC-20

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The technical standard for fungible tokens on the Ethereum blockchain. Any token built to this standard can be used with any compatible wallet, exchange, or dApp automatically.

USDC, LINK, and UNI are all ERC-20 tokens. Because they share the same standard, your MetaMask wallet can hold all of them without any special setup.

ERC-721

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The technical standard for non-fungible tokens (NFTs) on Ethereum. Unlike ERC-20, each token is unique and cannot be swapped one-for-one with another.

CryptoPunks and Bored Ape Yacht Club are ERC-721 collections. Each token has a unique ID and traits that make it distinct from every other in the collection.

Ethereum

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The second-largest cryptocurrency by market cap. A programmable blockchain that introduced smart contracts, enabling decentralized apps and DeFi.

Most DeFi protocols and NFT marketplaces are built on Ethereum.

F

Flash Loan

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An uncollateralized loan that must be borrowed and repaid within a single blockchain transaction. If not repaid, the entire transaction is reversed as if it never happened.

A developer used a flash loan to borrow $10 million, exploit a price difference across three DeFi protocols, repay the loan, and pocket $300,000 profit, all in one transaction.

Floor Price

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The lowest price at which any NFT from a specific collection is currently listed for sale. Used as a quick measure of a collection's minimum market value.

If the cheapest Bored Ape available is 20 ETH, the floor price is 20 ETH. Buyers looking for a bargain watch for the floor to drop.

FOMO

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Fear of Missing Out. The anxiety of potentially missing a profitable opportunity, which often drives people to buy into a rising market at the wrong time.

FOMO drove millions of retail investors to buy Bitcoin near $69,000 at the peak of the 2021 bull run, only to watch it fall to $16,000 the following year.

Fork

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A change to a blockchain protocol. A soft fork is a backward-compatible update. A hard fork creates a permanent split into two separate chains with different rules.

When Bitcoin Cash forked from Bitcoin in 2017, it was a hard fork. Anyone holding Bitcoin received an equal amount of Bitcoin Cash on the new chain.

FUD

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Fear, Uncertainty, and Doubt. Negative, often misleading information spread about a cryptocurrency to cause panic selling or suppress its price.

When a government threatens to ban crypto, FUD spreads fast on social media. Experienced investors often see this as a buying opportunity rather than a reason to sell.

Funding Rate

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A periodic payment exchanged between buyers and sellers in perpetual futures contracts to keep the contract price aligned with the spot price. Positive rate means longs pay shorts.

When Bitcoin perpetual funding rate is 0.05%, long holders pay short sellers 0.05% of their position every 8 hours. High positive funding is often a sign of overleveraged bulls.

Futures

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A contract to buy or sell a cryptocurrency at a predetermined price on a specific future date. Used for speculation or hedging price risk.

A trader buys a Bitcoin futures contract at $60,000 expiring in three months. If Bitcoin is at $70,000 at expiry, they profit $10,000 per contract.

G

Gas

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The fee paid to compensate for the computing energy required to process and validate transactions on the Ethereum network.

When the network is busy, gas fees can spike to $50+ for a simple token transfer.

Genesis Block

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The very first block in a blockchain. Block zero. It has no predecessor and was hardcoded into the blockchain software by its creator.

Satoshi Nakamoto mined Bitcoin's genesis block on January 3, 2009. It contains a hidden message: a newspaper headline referencing a bank bailout.

Governance Token

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A cryptocurrency that gives holders the right to vote on decisions affecting a protocol or DAO, such as fee changes, new features, or treasury spending.

UNI tokens let holders vote on Uniswap protocol upgrades. The more UNI you hold, the more voting power you have in the DAO.

H

Halving

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An event built into Bitcoin's code that cuts the reward for mining new blocks in half, occurring approximately every four years. Reduces new supply entering the market.

After the 2024 halving, miners received 3.125 BTC per block instead of 6.25 BTC.

Hard Fork

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A permanent, backward-incompatible upgrade to a blockchain that creates two separate chains. Nodes that do not upgrade are incompatible with the new version.

Bitcoin Cash was created by a hard fork from Bitcoin in August 2017, disagreeing over block size limits. Both chains have continued independently since.

Hardware Wallet

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A physical device that stores your private keys offline, isolated from internet-connected computers. The most secure way to store significant amounts of cryptocurrency.

A Ledger Nano is a hardware wallet about the size of a USB drive. Transactions must be physically confirmed on the device, so even malware cannot steal your keys.

Hash

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A fixed-length output generated by a cryptographic function from any input data. The same input always produces the same hash, but you cannot reverse a hash to find the original input.

Bitcoin uses the SHA-256 hash function. The hash of any block data produces a unique 64-character string. Change one character in the input and the entire hash changes.

Hash Rate

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The total computational power being used to mine and process transactions on a proof-of-work blockchain. Higher hash rate means more security.

Bitcoin's hash rate exceeded 700 exahashes per second in 2024, meaning the network performs 700 quintillion calculations every second to secure the chain.

HODL

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Slang for holding cryptocurrency long-term rather than selling, regardless of price swings. Originated from a typo of "hold" in a 2013 forum post.

True HODLers kept their Bitcoin through the 80% crash in 2018 and were rewarded by 2021.

Hot Wallet

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A cryptocurrency wallet that is connected to the internet. Convenient for frequent transactions but more vulnerable to hacks than cold storage.

MetaMask and Coinbase Wallet are hot wallets. They are great for daily DeFi use but should not hold large amounts you cannot afford to lose.

I

Immutability

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The property of a blockchain that makes recorded transactions permanent and tamper-proof. Once confirmed, data cannot be altered or deleted without redoing all subsequent work.

Because of immutability, a Bitcoin transaction from 2010 can still be verified today. No bank, government, or hacker can erase it from the record.

Impermanent Loss

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The temporary loss of value experienced by liquidity providers when the price ratio of the tokens they deposited changes compared to when they deposited them.

You deposit ETH and USDC equally into a liquidity pool. If ETH price doubles, you end up with less ETH than you started with. That difference is your impermanent loss.

Interoperability

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The ability of different blockchain networks to communicate, share data, and transfer assets between each other seamlessly.

Polkadot and Cosmos are built specifically for interoperability, allowing blockchains built on their platforms to exchange messages and tokens natively.

IPFS

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InterPlanetary File System. A decentralized file storage network where content is addressed by its hash rather than its location. Widely used to store NFT metadata and images.

When you buy an NFT, the image is often stored on IPFS rather than a central server. If the project disappears, the image remains accessible as long as nodes pin it.

K

KYC

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Know Your Customer. The identity verification process required by regulated financial platforms. Users must submit government ID and sometimes proof of address.

To withdraw more than $10,000 from Coinbase, you must complete KYC by providing your driver's license, date of birth, and Social Security number.

L

Layer 1

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The base blockchain network itself the main chain that handles its own security and consensus. All other solutions build on top of it.

Bitcoin and Ethereum are Layer 1 blockchains. They are the foundation. Everything else, from DeFi to NFTs to Layer 2 solutions, is built on top of them.

Layer 2

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A secondary network built on top of a Layer 1 blockchain to improve speed and reduce costs, while inheriting the security of the underlying chain.

Lightning Network (Bitcoin) and Arbitrum (Ethereum) are Layer 2 solutions. Transactions happen off the main chain but settle there, enabling thousands of transactions per second.

Leverage

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Borrowing money to increase the size of a trade beyond what your own capital would allow. Amplifies both gains and losses.

With 10x leverage on a $1,000 position, you control $10,000 worth of Bitcoin. If Bitcoin rises 5%, you profit $500 (50% on your capital). If it falls 5%, you lose $500 and risk liquidation.

Limit Order

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An instruction to buy or sell a cryptocurrency at a specific price or better. The order only executes when the market reaches your target price.

You place a limit buy order for Bitcoin at $55,000 when it is trading at $60,000. Your order only fills if the price drops to $55,000.

Liquidation

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When a leveraged position is forcibly closed by an exchange or protocol because losses have eroded the collateral below the required maintenance margin.

You open a 5x leveraged long position on ETH at $3,000 with $1,000. If ETH drops to $2,400 (20%), your position is liquidated and you lose your entire $1,000.

Liquidity

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How easily an asset can be bought or sold without significantly affecting its price. High liquidity means tight spreads and fast trades.

Bitcoin has high liquidity. A tiny obscure altcoin may have very low liquidity.

Liquidity Mining

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Earning extra token rewards on top of trading fees for providing liquidity to a DeFi protocol. A way for protocols to attract and incentivize liquidity providers.

A protocol might reward liquidity providers with 20% APY in trading fees plus 15% APY in governance tokens, making liquidity mining attractive despite impermanent loss risk.

Liquidity Pool

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A smart contract holding reserves of two or more tokens that enables decentralized trading on an AMM. Liquidity providers deposit tokens and earn fees from trades.

The ETH/USDC pool on Uniswap holds millions of dollars of each token. When you swap ETH for USDC, you trade against the pool, not another person.

LP Token

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A token given to liquidity providers as a receipt for their deposit into a liquidity pool. Returning the LP token lets you withdraw your share of the pool plus earned fees.

When you deposit ETH and USDC into Uniswap, you receive UNI-V2 LP tokens. Burn them later to withdraw your proportional share of the pool, including any fees earned.

M

Margin Trading

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Trading with borrowed funds from an exchange, allowing you to take larger positions than your account balance would otherwise allow.

With $5,000 and 3x margin, you can open a $15,000 position. Profits and losses are calculated on the full $15,000, not just your $5,000.

Market Cap

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The total value of a cryptocurrency. Calculated by multiplying the current price by the total circulating supply.

If a coin has 10 million tokens at $5 each, its market cap is $50 million.

Market Order

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An instruction to buy or sell a cryptocurrency immediately at the best available price. Guarantees execution but not the exact price.

You want to buy Bitcoin right now at whatever the current price is. You place a market order. It fills instantly at $60,047 the best ask price at that moment.

Mempool

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Short for memory pool. The waiting area where unconfirmed transactions sit until miners or validators pick them up and include them in a block.

When the Ethereum network is congested, the mempool can back up with thousands of pending transactions. Paying higher gas fees moves your transaction to the front of the queue.

Metadata

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Data that describes other data. For NFTs, metadata contains the properties, traits, and media files that make each token unique, usually stored on IPFS.

An NFT's metadata might include: name: "Bored Ape #1234", background: "Blue", fur: "Golden", eyes: "Laser". This data defines its rarity and appearance.

Minting

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The process of creating a new cryptocurrency token or NFT on a blockchain. For NFTs, minting is the moment a digital asset is published to the blockchain for the first time.

When an NFT project launches, collectors mint NFTs by paying a fee. The smart contract creates a new token, assigns it a unique ID, and sends it to your wallet.

Moon

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Slang for a cryptocurrency experiencing or expected to experience an extreme price increase. "Going to the moon" means the price is predicted to skyrocket.

When Bitcoin broke its ATH in late 2020, the crypto community declared it was mooning. "GM wen moon" became a daily refrain on crypto Twitter.

Multi-Sig

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Multi-signature. A security feature requiring multiple private keys to authorize a transaction, rather than just one. Like a bank vault that needs two keys turned simultaneously.

A company treasury uses a 3-of-5 multi-sig wallet. Any transaction requires three out of five executives to sign before funds can move, preventing any single person from stealing funds.

N

NFT

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Non-Fungible Token. A unique digital certificate of ownership recorded on a blockchain. Unlike Bitcoin, each NFT is one-of-a-kind.

A digital artist sold an NFT of their work for millions the buyer owns a verified original.

Node

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A computer that participates in a blockchain network by storing a copy of the blockchain and helping to validate and relay transactions.

Running a Bitcoin full node means your computer has downloaded all 500+ GB of Bitcoin transaction history and independently verifies every transaction without trusting anyone.

Non-Custodial

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A wallet where you control your own private keys, not a third party. You are solely responsible for your funds and security.

MetaMask is a non-custodial wallet. When you create it, you are given a seed phrase. No company has a copy. If you lose it, no one can recover your funds.

O

Off-Chain

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Activity that happens outside of the main blockchain, often to improve speed or reduce costs, with results settled to the blockchain later.

Lightning Network transactions happen off-chain between two parties. They are fast and free, with the final balance settled to the Bitcoin blockchain when the channel closes.

On-Chain

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Data or transactions that are recorded directly on the blockchain and are publicly visible and permanently stored. Opposite of off-chain.

An on-chain transaction is recorded in a block and can be viewed by anyone on a block explorer. It costs gas and takes time to confirm.

Optimistic Rollup

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A Layer 2 scaling solution that assumes all transactions are valid by default and only runs a fraud proof if someone challenges a transaction. Cheaper to operate than ZK-Rollups.

Arbitrum and Optimism use optimistic rollups. Transactions are considered valid unless challenged within a 7-day window, allowing fast processing with a safety fallback.

Oracle

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A service that provides real-world data to smart contracts on a blockchain. Since blockchains cannot access external information, oracles act as secure bridges.

Chainlink is the most popular oracle network. A DeFi lending protocol uses Chainlink to get the current ETH price so it knows when to liquidate undercollateralized loans.

Order Book

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A real-time list of all outstanding buy and sell orders for a cryptocurrency on an exchange, organized by price. Shows market depth and supply and demand at each price level.

If the ETH order book shows 500 ETH for sale at $3,000 and 800 ETH bids at $2,990, you know you can buy 500 ETH immediately at $3,000.

Overcollateralization

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Providing collateral worth more than the amount being borrowed. Common in DeFi lending to protect protocols against price volatility.

To borrow $1,000 on MakerDAO, you might need to deposit $1,500 worth of ETH (150% collateralization). This buffer protects the protocol if ETH price drops.

P

Paper Hands

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Slang for someone who sells their cryptocurrency quickly at the first sign of price decline or pressure, unable to withstand volatility.

Paper hands sold Bitcoin at $30,000 in 2021 thinking the bull run was over. Diamond hands held through the dip and eventually saw Bitcoin reach $69,000.

Paper Wallet

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A physical printout of your public and private keys, usually as QR codes. A form of cold storage, but fragile and must be kept secure from physical damage.

A paper wallet printed in 2013 and stored in a fireproof safe is an early form of cold storage. Many early Bitcoiners used them before hardware wallets existed.

Permissionless

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A blockchain system that anyone can join and use without needing approval from a central authority. No application, no gatekeeper, no discrimination.

Bitcoin is permissionless. Anyone with a phone can create a wallet and receive Bitcoin in seconds. There is no application form or credit check required.

Perpetual Contract

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A type of futures contract with no expiration date. Traders can hold positions indefinitely. The funding rate mechanism keeps the contract price near the spot price.

Bitcoin perpetual contracts on Binance let you speculate on Bitcoin price movements without ever owning BTC, with no contract expiration to worry about.

Phishing

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A cyberattack where fraudsters impersonate legitimate crypto services to trick users into revealing their private keys or seed phrases.

A fake MetaMask website emails you saying your wallet needs to be verified. You enter your seed phrase on the fake site and your funds are instantly drained.

Private Key

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A secret number that proves ownership of your cryptocurrency. Anyone who has your private key has your coins. Never share it.

Losing your private key is like losing cash there is no recovery without it.

Proof of Stake

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A consensus mechanism where validators are chosen to create new blocks based on how much cryptocurrency they lock up (stake) as collateral.

Ethereum validators stake 32 ETH to participate in securing the network.

Proof of Work

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A consensus mechanism where miners compete to solve complex mathematical puzzles to validate transactions and earn rewards. Energy-intensive by design.

Bitcoin miners use specialized hardware to solve puzzles and earn newly created BTC.

Protocol

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A set of rules that govern how a blockchain or DeFi application operates. In DeFi, protocol often refers to the underlying smart contract system.

Aave is a lending protocol. The protocol defines the rules: how collateral works, what assets can be borrowed, and how interest rates are calculated.

Public Key

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Your crypto address the string of characters you share with others to receive payments. Derived mathematically from your private key.

You can share your public key (address) freely. It is like your bank account number.

Pump and Dump

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A fraudulent scheme where organizers buy a low-cap token, aggressively promote it to drive up the price, then sell their holdings at the peak, leaving other investors with losses.

A Telegram group with 50,000 members coordinates a pump on an obscure altcoin. They all buy at once, the price spikes 500%, the organizers dump their holdings, and the price crashes.

R

Rekt

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Slang derived from "wrecked." Used to describe a trader or investor who has suffered severe losses, often from bad timing, overleveraging, or a rug pull.

The trader opened a 20x leveraged long position right before a flash crash. They got completely rekt, losing their entire $10,000 in under a minute.

Rollup

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A Layer 2 scaling solution that processes transactions off the main chain and then posts compressed data back to the main chain. Dramatically increases throughput while maintaining security.

Arbitrum uses optimistic rollups to process thousands of Ethereum transactions per second at low cost. Every few minutes, it posts a summary of all those transactions to Ethereum.

Rug Pull

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A scam where developers of a crypto project suddenly withdraw all liquidity and disappear with investor funds, leaving the token worthless.

A new DeFi project promises 1000% APY. Thousands of investors deposit funds. Three weeks later, the developers drain the liquidity pool and delete all social media accounts.

S

Satoshi

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The smallest unit of Bitcoin. One Bitcoin equals 100,000,000 satoshis. Named after Bitcoin's creator.

At $100,000 per BTC, one satoshi is worth $0.001 still a real amount of money.

Scalability

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A blockchain's ability to handle increasing numbers of transactions without sacrificing speed or increasing costs. The main challenge for major blockchains.

Bitcoin processes about 7 transactions per second. Visa processes 24,000. Solving this scalability gap is the core goal of Layer 2 solutions and next-generation blockchains.

Seed Phrase

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A list of 12 or 24 random words that serves as a master backup for your crypto wallet. Anyone who has your seed phrase has full access to all your funds. Guard it with your life.

Your seed phrase might look like: witch collapse practice feed shame open despair creek road again ice. Write it on paper, store it securely, and never type it online or share it with anyone.

Sharding

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A database partitioning technique adapted for blockchains. The chain is split into smaller pieces (shards) that process transactions simultaneously, increasing throughput.

Ethereum's roadmap includes sharding to dramatically increase capacity. Instead of every node processing every transaction, different shards handle different subsets in parallel.

Shill

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To aggressively and often dishonestly promote a cryptocurrency, usually because the promoter holds it and wants the price to go up. Sometimes undisclosed paid promotion.

When a celebrity tweets enthusiastically about a new token they were secretly paid to promote, that is shilling. The SEC has taken action against several such promotions.

Slippage

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The difference between the expected price of a trade and the actual price at which it executes. High slippage occurs with low liquidity or large trades relative to pool size.

You try to swap $100,000 of a small token on Uniswap. Because the pool is small, your large order moves the price as it fills. You expected $1.00 per token but got $0.87.

Smart Contract

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Self-executing code stored on a blockchain that automatically enforces the terms of an agreement when predefined conditions are met.

A smart contract can automatically release payment to a seller when a buyer confirms delivery.

Soft Fork

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A backward-compatible upgrade to a blockchain protocol. Old nodes can still recognize new blocks, though they do not support the new rules.

SegWit was a Bitcoin soft fork in 2017. It changed how transaction data is structured but did not split the chain. Upgraded and non-upgraded nodes could still interact.

Spot Trading

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Buying or selling cryptocurrency for immediate delivery at the current market price, without leverage. The most straightforward form of crypto trading.

Buying 1 ETH on Coinbase at the current price of $3,000 is spot trading. You pay $3,000 and receive 1 ETH immediately into your account.

Stablecoin

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A cryptocurrency pegged to a stable asset like the US dollar, designed to minimize price volatility.

USDC and USDT are stablecoins 1 USDC is always worth approximately $1.

Staking

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Locking up cryptocurrency in a proof-of-stake network or protocol to earn rewards. Similar to earning interest, but your staked tokens also help secure the network.

Staking 32 ETH on Ethereum earns you approximately 4% annually in ETH rewards for helping validate transactions. You can unstake and withdraw, though there may be lock-up periods.

Stop Loss

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An automatic order to sell a cryptocurrency when it reaches a certain price, limiting potential losses on a position.

You buy ETH at $3,000 and set a stop loss at $2,700 (10% below). If ETH drops to $2,700, your position automatically sells, protecting you from a larger loss.

T

Token

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A digital asset created on an existing blockchain. Distinct from a coin, which is native to its own blockchain. Tokens use smart contracts to exist on another chain.

USDC is a token built on Ethereum (and other chains). It is not native to Ethereum like ETH is. It is created and managed by a smart contract.

TPS

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Transactions Per Second. A measure of how many transactions a blockchain can process per second. A key metric for evaluating scalability.

Bitcoin handles about 7 TPS. Ethereum handles 15-30 TPS. Solana claims 65,000 TPS. Visa processes around 24,000 TPS. Layer 2 solutions aim to bridge this gap.

Transaction Fee

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The cost paid to miners or validators to have your transaction included in a block. On Ethereum this is gas. On Bitcoin it is denominated in satoshis per byte.

When Bitcoin is congested, transaction fees can spike above $50 per transaction. During quiet periods, the same transaction might cost less than $1.

Trustless

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A system where participants do not need to trust each other or any third party because the rules are enforced by code and mathematics. A core property of blockchains.

Bitcoin is trustless. You do not need to trust Satoshi, a bank, or any company. The math guarantees that transactions are valid. The code enforces the rules.

TVL

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Total Value Locked. The total amount of cryptocurrency deposited in a DeFi protocol. A key metric for measuring the size and health of DeFi projects.

When Aave has $10 billion TVL, it means users have collectively deposited $10 billion worth of crypto as collateral or liquidity in the protocol.

V

Validator

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In proof-of-stake blockchains, a participant who locks up cryptocurrency as collateral and is chosen to create new blocks and verify transactions. The proof-of-stake equivalent of a miner.

Ethereum validators stake 32 ETH and earn approximately 4-5% annual yield for validating transactions. Dishonest validators can have their stake slashed as punishment.

Volatility

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The degree of price variation of a cryptocurrency over time. Crypto is highly volatile compared to traditional assets, meaning prices can swing dramatically in short periods.

Bitcoin has historically experienced 80-90% drawdowns during bear markets and 1000%+ gains during bull runs. This extreme volatility is both the opportunity and the risk.

W

WAGMI

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We Are All Going to Make It. A rallying cry of optimism in the crypto community, expressing collective confidence that investments will pay off.

After a brutal market dip, the community reassures each other with WAGMI. The opposite, NGMI (Not Gonna Make It), is used humorously for bad investment decisions.

Wallet

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Software or hardware that stores your private and public keys, allowing you to send and receive cryptocurrency. Your wallet does not store coins the blockchain does.

A hardware wallet like a Ledger stores your keys offline, making it harder to hack.

Web3

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A vision of a decentralized internet where users control their own data and assets through blockchain technology, rather than relying on centralized companies.

In Web3, you own your digital items in a wallet. A game cannot delete your sword because it exists on the blockchain. Your identity travels with you across platforms.

Whale

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An individual or entity holding a large enough amount of cryptocurrency to significantly influence the market price when they buy or sell.

When a Bitcoin whale moves 10,000 BTC to an exchange, crypto twitter panics that a major sell-off is coming. A single whale trade can move the market by several percent.

Whitepaper

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A technical document published by a cryptocurrency project that explains its purpose, technology, tokenomics, and roadmap. Essential reading before investing in any project.

Satoshi Nakamoto's 2008 Bitcoin whitepaper titled "Bitcoin: A Peer-to-Peer Electronic Cash System" is 9 pages long and launched a trillion-dollar industry. Always read the whitepaper.

Wrapped Token

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A token that represents another cryptocurrency on a different blockchain. The original asset is locked in a smart contract and an equivalent token is issued on the new chain.

WBTC (Wrapped Bitcoin) is Bitcoin locked in a smart contract and represented as an ERC-20 token on Ethereum. This lets Bitcoin holders participate in Ethereum DeFi.

Y

Yield Farming

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Strategically moving crypto assets between DeFi protocols to maximize returns. Also called liquidity mining. Can involve lending, borrowing, and providing liquidity simultaneously.

A yield farmer deposits USDC into Protocol A to earn 8%, then takes a loan against that deposit to buy more USDC, deposits again, earning compounded returns across multiple protocols.

Z

ZK-Rollup

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A Layer 2 scaling solution that uses zero-knowledge proofs to validate transactions off-chain and post cryptographic proof to the main chain. More efficient than optimistic rollups.

zkSync and StarkNet use ZK-Rollups. They process thousands of Ethereum transactions and post only a tiny cryptographic proof to Ethereum, reducing costs and increasing speed.

zkSNARK

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Zero-Knowledge Succinct Non-Interactive Argument of Knowledge. A cryptographic proof that lets one party prove they know something without revealing what they know.

Zcash uses zkSNARKs to let users prove a transaction is valid without revealing the sender, receiver, or amount. The math confirms everything is correct with zero information disclosed.