USDT is a stablecoin, it doesn't have any volatility to make a profit, I don't think anyone will invest in it, this is the first time I heard of investing in USDT, LOL.
The profits of bitcoin used to be so great, it created a lot of millionaires in the world. But if to compare the returns of bitcoin with altcoins these days, bitcoin is not comparable to altcoins. What bitcoin gives us is safety that is superior to all altcoins, but in terms of returns, bitcoin is not comparable to altcoins. It's a truth that many bitcoin maximalists won't want to hear, but it's true. But don't forget, not all altcoins are profitable, and finding potential altcoins is up to each investor's ability.
Maybe no one will invest in USDT but we do not know. But USDT can be a good solution to prevent a down value on your asset so I think that will be a good place to invest in USDT for a while until the market increases again. But FYI, USDT is a good place to stake
Finding the right altcoin is difficult because we have to check each altcoin and there is no guarantee that an altcoin currently in a good position will continue to be profitable. Maybe that's why altcoins can only be short- and medium-term investments so that bitcoin is still the best for long term investments. Bitcoin and altcoin returns are different, but we want to benefit from both, so we want to have many altcoins that can provide benefits.
USDT is a good alternative to fiat as it would be very labor intensive to go into fiat every time. USDT is very well suited to take profits and wait for some time before a new purchase, and if you no longer plan to use some part for further investments, then of course you should cash them out.
You can try to find an altcoin that will rise when bitcoin is flat or fall, but this is not an easy task. Basically, we see the market following bitcoin, so I don't see the point in looking for an altcoin that will bring in more profits compared to bitcoin, and when there is a risk that the price of this altcoin may fall significantly.
Searching for altcoins from the list of altcoins on the market takes a long time because, apart from the top lists, we also have to look beyond that because there are altcoins that can improve in the future. And we would never have thought that altcoins could rise high and replace the top positions. And the risk of increasing bitcoin prices will affect altcoin prices so we must be careful in choosing altcoins as investments.