If you want to earn from staking your USDT why not use a trusted platform?
Most trading sites now offer staking but the APY fluctuates from time to time but still it is better to be safe than sorry.
I also think that it is better to stake USDT or stable coins now compared to trading altcoins specially for day traders or those who are aiming for short term trades.
yeah, even most of exchange now offer massive APR as high as 300% for few days but limited to new member that just got registered only.
plenty of choice out there, ultimately APR always floats around 5-10% in most of exchange but I'd take that over losing in such turbulence altcoin market.
but I advise OP to not expect much profitability wise unless he staked millions, these staking hardly worth the time but still a good way to at least increase the capital.