What Is Cryptocurrency Exchange?
A crypto exchange is where users buy, sell, and trade cryptocurrencies. There are two fundamental types:
Centralized Exchanges (CEXes): Coinbase, Binance, Kraken. These operate like traditional brokerages — they hold custody of your funds, match trades on their internal order books, and require KYC. Fast and convenient but you don't control your private keys.
Decentralized Exchanges (DEXes): Uniswap, dYdX, GMX. These are smart contracts running on blockchains. Users keep custody of their funds and trade by interacting with the contract directly. No KYC but more complex UX and gas costs.
For most retail traders, CEXes are the default — easier UX, customer support, fiat on-ramps. For users prioritizing self-custody or trading long-tail tokens, DEXes are essential.
The "not your keys, not your coins" principle matters here: any crypto held on a CEX is owned by the exchange, not you. The collapses of FTX, Mt. Gox, and others made this lesson expensive for millions of traders.
Related terms
- DeFi (Decentralized Finance) — Financial applications built on blockchain without traditional intermediaries.
- Stablecoin — A cryptocurrency designed to maintain a stable value, usually pegged to USD.
- Liquidity — The ease with which an asset can be bought or sold without significantly affecting its price.