Because bitcoin is not the only cryptocurrency in the market.

1. Ethereum (ETH)

2. Tether (USDT)

3. USD Coin (USDC)

4. Binance Coin (BNB)

5. Binance USD (BUSD)

6. XRP

7. Cardano (ADA)

8. Solana (SOL)

9. Dogecoin (DOGE)

10.Polkadot