Great point you've brought up! Currently WBTC happens on non-native chains(e.g. Ethereum) which are perfectly fine. But with Stacks, which is connected to Bitcoin network via PoX, we can now have DeFi natively on Bitcoin!

Yup you're right that the APY fluctuates depending on market conditions, etc. Receiving BTC payouts every 2weeks is a pretty cool thing to do, and it helps you to DCA into BTC without having to purchase BTC from exchanges or using expensive mining equipment to mine btc. Theres a huge community around stacking STX to earn BTC, check it out here!