After a quiet 2017, 51% Blockchain attacks have hit with a vengeance this year… Cryptocurrency projects have found themselves vulnerable this year ...
source https://www.google.com/url?rct=j&sa=t&url=https://cryptonewsreview.com/51-attacks-on-blockchain-lead-to-20m-of-cryptocurrency-theft/&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNHoJp10SMSeg9f0Cg9Qdy7qV-PeWg
