Cryptocurrency Exchanges Exchanges offer trading (i.e. buying and selling cryptocurrencies) using fiat or other cryptocurrencies. Buy cryptos using credit or debit cards. Trading happens in the USD/BTC, EUR/BTC, USD/ETH, EUR/ETH, etc. pairs. CEX.io Coinbase Whaleclub BitBay Coinmama Kraken Bitstamp LakeBanker Bitit