Bitcoin is safe unless you the owner as the same as banker become negligence in handling your Wallet or placing your coins in less reliable exchange.
Well, I see bitcoin as the most safe cryptocurrency of all. It is true that mishandling your bitcoin's wallet is one good reason why your Bitcoin will be hacked. Bitcoin surely is a safe and reliable cryptocurrency, so it is in our hand to make it safer than it was. We must look for a reliable safe to keep our bitcoins.