Coincheck Hack: “The Biggest Theft in the History of the World” This morning, the Japanese crypto exchange platform Coincheck was hacked and had 526 million XEM (c. USD 400 m) stolen, Lon Wong, President of the NEM.io Foundation, told Cryptonews.com. It has nothing to do with NEM – there is no issue with the tech, and according to them, the blame lies exclusively with Coincheck: “As far as NEM is