As long as they are online all wallets have a chance to get hacked, so if you are going to choose an online wallet the safest I know would be blockchain.com because I haven't heard them lose any money from any hacking at all but maybe they did that I didn't hear about or maybe they will one day in the future.

Basically, use an offline wallet that would have no connection to any central location if you want super safe wallet. There are trezor and ledger nano s and so forth that basically makes sure you are securing yourself without no central data location. Otherwise all of them are still dangerous and including the biggest places there is no place that would be safe for you.