i think is Bitcoin is safe in my opinion as compare to paper money because no one is stolen your money, you can purchase goods in safe mode
I think the risk of loss due to theft, always there. There are many kinds including a scam site or hacker
they are very clever, send malware into your computer and steal passwords, all the contents of your wallet, will be lost
Actually bitcoin in itself is very safe and the keeping of it is safe also but because it is anonymous to some extent, scammers/thieves/hackers find it an easy target and that makes people think its not safe. But as it gets popular and reputable services start to accept it then these problems will be solved.