$BTC Some popular coin pairs with Bitcoin (BTC) include:

1. BTC/USDT (Bitcoin vs. Tether)

2. BTC/ETH (Bitcoin vs. Ethereum)

3. BTC/USDC (Bitcoin vs. USD Coin)

4. BTC/LTC (Bitcoin vs. Litecoin)

These pairs allow traders to exchange Bitcoin for other cryptocurrencies or stablecoins. Which pair are you interested in? Or would you like to know more about a specific pair?