indeed in the future we do not know what will happen to usdt, but so far usdt is safe, in the sense that it is a stable coin that is safe to temporarily put our money, and is not suitable for investment, because there is no development. although there are currently some stable coins appearing, such as busd, but usdt still tops the list for stable coins
All forms of altcoins are basically suitable for investment, both long-term and short-term, it's just that when an investment is made, it is necessary to analyze market conditions and the potential condition of the coin, so that we can determine the right time to invest.
In my opinion USDT is feasible and quite promising in investing, it just takes time and patience to see its potential in the future, this will affect our actions in making investments, which can ultimately provide maximum profit.