$BTC are a few possibilities:

1. BTC Trading Pairs – Do you want a list of cryptocurrencies that are commonly traded against BTC (e.g., ETH/BTC, ADA/BTC)?

2. BTC Price in Another Coin – Are you looking to know the current exchange rate of BTC relative to another cryptocurrency?

3. Arbitrage Opportunities – Are you looking for profitable BTC pairings across exchanges?

4. Pair Recommendation – Do you want a recommendation for a coin to pair or trade with BTC?

5. Exchange-Specific Pair Listing – Are you asking for BTC pairs on a specific exchange (like Binance, Coinbase, etc.)?