People should use safer browsing habit and along with that should diversify their bitcoin and altcoin holdings in as many places as possible.
Exchanges, online wallets and hot wallets in gambling sites.
If you are not using it regularly, you can just export the private key in encrypted form and remove every trace of its existence.
This tops it all. All gist. We have to know all the precautionary measures to avoid being hacked. Ofcourse you need to be afraid sometimes to be more cautious.