When it comes to the safest one to save the assets, CEX or DEX, or online wallets, are definitely not the choice. The best is offline or hardware wallet, non-custodial wallets. The point is, there is a price, there is a form. and not your keys, not your assets. That is the principle that we must apply.
If we choose to go long term, it is better not to exchange or online wallet, it is really risky, from various cyber crimes that sometimes we ourselves are not aware of.
And if we still choose exchange, well, we accept it along with the various risks and pluses and minuses.