I am also a panicked person, because all the cryptocurrencies in my wallet are bleeding, now I have sold them to USDT for saving!
you shouldn't have been bag holding altcoins in first place. about 7-8 years of altcoin history is more than enough to tell you that.
as for USDT, be very careful with this altcoin. it is not as safe as you may think. it has become very popular and majority of the market, specially altcoin traders, are using it but this token is still pretty risky because it is a centralized coin which may not even really be backed by real US dollars. and the company issuing them has been known to be shady.