$BTC

A pair of BTC coins represents the exchange relationship between Bitcoin (BTC) and another cryptocurrency or a fiat currency. For example, in the BTC/USD pair, it indicates how much US dollar (USD) is needed to purchase one Bitcoin. These pairs are fundamental on exchange platforms, allowing users to buy and sell BTC with other assets, thereby facilitating trading and speculation on relative price movements. Some popular BTC pairs include BTC/USDT, BTC/ETH, and BTC/EUR.