although I fail to understand why would people hold USDT, since it won't grow bigger than 1$ (stablecoin), it has issues with its backing and you have to trust the issuer (again, stablecoin).
Because not everyone is here for the technology (I really hope you got what I meant 
). Well, you may need to liquidate your investment at some point & stablecoin is there to give you that benefit. If I'm correct, USDT had some ongoing issues few days ago as well but last week they had some good adjustments/settlement.Quote
I didn't hold USDT, but if I'm right, you may have to keep some small ETH amount too in Metamask for the fees. (If I'm wrong, please somebody correct me.)
Depends on which chain you are using. BTW, the amount of ETH for sending USDT on ERC20 isn't small I guess. It's pretty high.I always wonder if we have any stable coins which is decentralized.
DAI is claimed to be decentralized but I have no idea as I haven’t had a closer look.