A **cryptocurrency exchange** is an online platform where users buy, sell, and trade digital currencies like Bitcoin, Ethereum, and thousands of altcoins. It acts as a marketplace, matching buyers with sellers, often supporting fiat-to-crypto conversions, spot trading, futures, and staking. Popular examples include Binance, Coinbase, and Kraken, with varying fees, security, and features. (48 words)

BTC-2,8%
ETH-3,53%
COINON-1,34%
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