So If i have usdc usdt ?
Can be freezed? Should i use them and worry about ?
There is risk and if you want to store your money in very long term, Bitcoin is your best choice. No one, no entity, no government can seize your bitcoin because only you own private keys of your bitcoins.
It's your Bitcoin private keys, it's your bitcoins.
Some banned stablecoin addresses:
They are not actually stable but volatile and can depeg too.