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 ?...
Depends on the miners on it. Also on the platform that you will going to support. Well, block chain is hackable based on the hashpower that is has in the cryptocurrency space. Choose those that are well diversified.