i think USDT is seen as a rare safe haven asset in a famously volatile asset class. When the price of a digital asset crashes, traders may choose to move their position to tether quickly in an effort to minimise potential losses,so as long as you hold it for a long time, I think it's safe.
Stable coins can save you from incurring huge losses as their price does not change in the market. But to find the right time to convert your other assets to stable coins, a trader needs to know enough about the market. If you have enough stable coin reserves in the Bear Market, you can prepare for the next bull run. So it is very important to get out of the market at the right time.