What is cryptocurrency exchange, A cryptocurrency exchange is an online platform where users can buy, sell, or trade digital assets like Bitcoin, Ethereum, and altcoins. These platforms may be centralized (CEX) or decentralized (DEX), offering various trading options such as spot, futures, and margin. Exchanges act as intermediaries or protocols facilitating price discovery, order matching, and fund transfers. Key features include user authentication, wallets, liquidity, and security measures. Exchanges are essential to the crypto ecosystem, enabling access to markets and fostering digital asset adoption worldwide.