$BTC Here are some popular cryptocurrency pairs with Bitcoin (BTC):

1. *BTC/USDT*: Bitcoin to Tether

2. *BTC/ETH*: Bitcoin to Ethereum

3. *BTC/LTC*: Bitcoin to Litecoin

4. *BTC/BNB*: Bitcoin to Binance Coin

You can find real-time prices and trading information for these pairs on platforms like:

1. Binance

2. Coinbase

3. Kraken

4. CoinMarketCap

Some specific coin pairs with Bitcoin include:

1. AAVE/BTC (Aave to Bitcoin)

2. ALCX/BTC (Alchemix to Bitcoin)

3. ALGO/BTC (Algorand to Bitcoin)