$BTC **Fees:** Stablecoin pairs often have lower fees than fiat pairs.
- **Regulation:** Fiat pairs require KYC; USDT pairs may face scrutiny.
- **Volatility:** Altcoin/BTC pairs can swing wildly (e.g., if BTC dumps, alts may drop harder).
- **Regulation:** Fiat pairs require KYC; USDT pairs may face scrutiny.
- **Volatility:** Altcoin/BTC pairs can swing wildly (e.g., if BTC dumps, alts may drop harder).