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A cryptocurrency exchange, or a digital currency exchange (DCE), is a business that allows customers to trade cryptocurrencies or digital currencies for other assets, such as conventional fiat money or other digital currencies. Exchanges may accept credit card payments, wire transfers or other forms of payment in exchange for digital currencies or cryptocurrencies. A cryptocurrency exchange can be a market maker that typically takes the bid–ask spreads as a transaction commission for its service or, as a matching platform, simply charges fees.

Some brokerages which also focus on other assets such as stocks, let users purchase but not withdraw cryptocurrencies to cryptocurrency wallets while dedicated cryptocurrency exchanges do allow cryptocurrency withdrawals.