$BTC You're looking for trading pairs involving Bitcoin (BTC). Here are some popular BTC pairs:

1. *BTC/USDT*: Bitcoin paired with Tether (a stablecoin pegged to the US dollar)

2. *BTC/USD*: Bitcoin paired with the US dollar

3. *BTC/EUR*: Bitcoin paired with the Euro

4. *BTC/ETH*: Bitcoin paired with Ethereum

You can find these pairs on various cryptocurrency exchanges like Binance, Coinbase, or Kraken. Which exchange or specific pair are you interested in