Well i think stable coins is not an object of having more profit, as you think that people who are trying to get more coins is because to have more assets but not just possessing them. Thats why stable coins are not useful, and i think there are some insufficiencies behind the Tether, thats why am not recommending it to you.
Yeah stable coins like Tether are the safe haven for some traders to avoid losses when the market is on the bear run or it is fluctuating negatively, most of the trades I see on the CMC have pairings for some of the stable coins and local fiat currencies whether they are cashing out or they are just
securing their own losses so it is not for the sole purpose of earning profit but they are used for some occasions and events, don't know if Tether resolved their own issues about the printing USDT without the backing of the physical USD.