The problem is not the crypto/token asset the real problem is the wallet where you store them. If you store you Tether.to/USDT on a Exchange or unsafe wallet, your are not safe. If you store it in your own wallet, you are in the safest position as you can.
So in essence the security of your money depends on how you keep it, if stored in a safe place it can reduce the risk of thieves,Free to choose a well known wallet and large exchanges. Keep your passwords lest anyone else find out. Increase security to the most level high