Do you think it's better to save in stable coin like usdt or I should just keep the money in the bank?
My candid advice to you is very simple, Cryptos are getting cheap daily, I guess it's time you buy, and you may also want to diversify your portfolio. You can start DCAing from this moment, but I must warn you that at least 40% of your total investment budget should be involved by now if you wouldn't want to painfully miss out. It's just advice.
But if by any chance your speculation and gut tell you to wait, I advise you to save the money in the bank, but must be domiciled in the USD if possible in your country. Don't forget that USDT is a centralised entity, by this, it will serve the same purpose as being in the bank.
Except in the bank, you are offline which indicates better safety.