I don't think there is a problem with stacking stablecoins, in fact the profit earned is usually greater than just relying on bank deposit interest, so of course it's worth it. My advice is to do staking on large and safe exchanges, for example Binance exchanges
honestly there are times when the APY offered was lower than bank deposits that make it somehow doesn't really look worth it in my opinion. but the APY in regard of staking stablecoin in general always vary so I guess it kinda depends in the time that we invested in.