According To expect they always say blockchain can never be hacked and your information can never be stolen .. But day in day out Hacker are hacking crypto exchanges to steal people asset , ETH Suspended hard Fork because of security reason . HitBTC and Cryptopia are understand maintenance because of hacker . Are they Using block-chain technology to deceive Us ?...
Blockchain is just a new technology. It's too raw still. So, it's obvious that some breaks and hackings will happen in the nearest years. This will happen often until developers will learn on their mistakes and improve their security systems enough to withstand all these attacks.