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 ?...
Because all these exchanges have nothing to do with blockchain, they are centralized and thus quite vulnerable. But look at all those decentralized exchanged fully built on blockchain. There is not a sinle hack there and won't be)) Concerning ETH they didn't suspend anything they are just playing for time in such market conditions like everyone else do...