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 ?...
Online technologies are prone to hacking, thus it only bonded with codes as its securities. Many individuals have studied this hacking strategies as their job also but for us, it is serious crime and illegal activities.
Many were caught for hacking but it takes a months or even a years to discover who's the person involve. There is a lot of money in big exchanges and so they wanting to have it, that is why they should improved their security codes and do updates.