$BTC A BTC pair refers to a trading pair where Bitcoin (BTC) is the base currency and another asset (like ETH, USDT, or ADA) is the quote currency. In BTC pairs, traders buy or sell other cryptocurrencies using Bitcoin instead of fiat currencies like USD. For example, in the ETH/BTC pair, you're trading Ethereum priced in Bitcoin. BTC pairs are common on global exchanges because Bitcoin is the most widely held and liquid cryptocurrency. These pairs allow users to diversify their portfolios, hedge positions, or take advantage of market fluctuations—all while using Bitcoin as the central medium of exchange.