$BTC You're looking for cryptocurrency pairs with Bitcoin (BTC). Here are some popular options:

1. BTC/USDT (Tether)

2. BTC/USD (US Dollar)

3. BTC/ETH (Ethereum)

4. BTC/BNB (Binance Coin)

5. BTC/LTC (Litecoin)

These pairs allow you to trade Bitcoin for other cryptocurrencies or fiat currencies. Which pair are you interested in? Or would you like to know more about trading or market trends?