I don't advice you to convert your alt coins to usdt as it is not fully backed by asset as they claimed. They just printed 5 billion usdt and it's not a good sign. Instead convert your alt coins to USDC or Dai because it's much safer and reliable compared to Usdt.
That's a very good suggestion, I will choose USDC. For conversions from altcoin to USDC, because in my opinion USDC is one of the stable coins that is safe. And now I save all my assets in USDC. Maybe someone can use this suggestion for those who want to secure their assets because the crypto market is not good.