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.
Actually, there are some to make your bitcoin safe and secure like putting 2fa authenticator where will help you to notice if someone try to open your wallet. I agree that do not ever store your bitcoin in a exchanger and try to store your bitcoin in an trusted wallet.