$BTC
The coin pair $BTC refers to Bitcoin, but to fully identify the trading pair, you need to specify which quote currency it's being traded against.
Common BTC trading pairs include:
BTC/USDT – Bitcoin vs Tether (most popular)
BTC/USD – Bitcoin vs US Dollar
BTC/BNB – Bitcoin vs Binance Coin
So, $BTC is the base currency, and the second coin (e.g., USDT) is the quote currency. The pair shows how much of the quote currency is needed to buy 1 BTC.
