It depends on how you secured your bitcoin. There are wallet out there that are very trusted and are secure. Its really up to us how we protect our bitcoin. We are our own banks, so we should know how to protect it from hackers.
If you are lured by bitcoin, then you should learn all about it. Specially wallets to keep you safe and secure. Everything that is about money needs to be protected right? Bitcoin is no different. And far as those people who have lost their bitcoin, there's no one to blame but themselves. Bitcoin shows us avenue to make money, but if you are too lazy to protect it, them eventually someone will get it from you.