Stablecoin staking isn't as profitable as it used to be, especially when it's centralized. I remember starting with 10% APY on Binance, and it's now lower than 3-4% on a good day. Decentralized staking offers somewhat better options, but you shouldn't expect any miracles with the most reputable ones, USDT, USDC, and BUSD. You'll have to use one of them in combination with another, usually an algorithmic stablecoin such as TUSD, if I'm not mistaken. And there's still risk involved; we all saw what happened with UST, one of the largest stablecoins by market cap.
Seems all staking coins kinds is not profitable beside have lower price when staking time have been finished, stable coins is favorite staking by many people due stable price but not recommended yet with lower percentage income under 10% APY on several exchange market. Due staking I prefer use my fund for trading because potential higher earning or profit than staking but have risk later when price have been drop.
Have exceptional, if coins trading have been drop and try to hold until price going up I will stake that coins. If not have dropped when trading time never has ideas for staking coins because always have sad ended when release staking with price drop than first time start with staking.