The best way to keep your bitcoins safe, is to use a hardware wallet that have stronger cryptography that web wallets.
If you store your coins in exchanges you are most likely to lose them, because exchanges receive the most cyber attacks.
Even hardware are not completely safe if some damage occurs to the device with forgetting 25 words to restore old wallet with new device but it still best choice along with paper wallet . right now people fear the dump only because many bought bitcoin at high price .
These days it is not avoidable that our bitcoin won't be hacked by hackers if we are not cautious, because even ledger wallet can be hacked. For me online wallets are secured and it depends on us for it to be safe, I guess we should be really carefull where we type our wallet's private keys, we should avoid being hooked by phishing and fake websites. Our safety depend on us on how we carry our wallet safely.