Stable Coin is stable coin because none will add extra value to your assets only just to preserve the value so why looking for who is better, I think rather you look for who is more secured that will stick around for long, usdt seem to be the most used but with many fud surrounding it,
I sometimes use Busd and to me seem more secure, and as for Dai i have never use it, I only stick to the ones I have used, but the choice is yours.
A lot of people just want to save their profits in stable coins so that they can buy BTC when they wish so it is a real concern which stable coin one should use in current time when tether is facing so much heat and there isn't any good decentralized stable coin apart from DAI.
of course many choose USDT to save assets because this stable coin is a coin that is already popular in the eyes of crypto users many advantages one of them is a transaction tool low fee fast network and has multiple platforms, I always save my assets to USDT when bear season comes
Yes, that's the only option right now but the problem is that Tether controls everything you hold and they can dump the market if they wish, I don't think they will or should but risk is always there.
I would agree on low fees if it's the TRC-20 version but the erc-20 USDT is another matter. We all know the congestion and the high fees over the ethereum network. I'd prefer BUSD when we're talking about fast and cheap.
I don't think fees is playing into anyone's mind when we are looking to save money for future and only have to spend the transaction fees once when saving and again when withdrawing.