Is yield farming for interest capital gains worth it?

Yield farming is not a risk-free way to earn passive income. When you deposit your crypto to a liquidity pool, you actually deposit it to a crypto protocol (like Aave or Compound). Although it doesn't happen to reputable protocols, the protocol can get attacked and your funds could get stoled by an attacker. If you want a safer option with potentially smaller returns, I'd recommend staking your crypto. A good place to start is a CEX like Binance, Nexo, and Coinbase.