I guess my question is: what’s your go-to strategy when the market isn’t favorable to you? And do you think staking rewards of 8% APR on USDT are sustainable?

I'm converting my stable to the Principle Token aka stable yield token.
As for 8% APR on USDT is far below from what offered by defi platforms, but i can tell you if APR may not be stable as it goes up and down depending on the market situation. You may be missing that if 8% will be only last for 90 days, and i think it's not worthy.
I'd rather than go to the Principal Yield token instead of staking on the CEX. In PT, you received stable yield, but redeemable to the 1 PT : 1 Stable token at the maturity.