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 ?...
well, in past from what i know is blockchain really can't get hacked. If it is can get hacked, a lot of transaction already disturbed by that. From what happen like market that got hacked, it is pure on their security which can accessed by that hackers.