$BTC A BTC pair refers to a trading pair where Bitcoin (BTC) is used as the quote or base currency against another cryptocurrency. For example, in the ETH/BTC pair, traders exchange Ethereum for Bitcoin and vice versa. BTC pairs are popular on crypto exchanges, especially when Bitcoin is used as a benchmark or reserve asset. These pairs allow traders to speculate on the relative performance of altcoins against Bitcoin rather than fiat currencies like USD. Monitoring BTC pairs helps assess the strength of altcoins, market sentiment, and overall crypto trends. High volume BTC pairs typically indicate strong interest and liquidity.