my friend got hacked yesterday
Well, thing is, you have your own bank (unless you use online wallets, which I suggest you don't), so you have a control of your own security. This means that it can potentially be very safe, but if you're not careful you aren't safe at all.
Well, nothing is completely safe
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
His friend was probably using blockchain, and a hacker hacked him for some reason.
But seriously, make a paper wallet, hide it inside your bank, that's as safe as it gets :/