https://www.theguardian.com/business/2018/jun/20/south-korea-bithumb-loses-315m-in-cryptocurrency-heist

Virtual coins stolen by hackers, exposing risks of trading the digital asset

The South Korean cryptocurrency exchange Bithumb said 35bn won ($31.5m) worth of virtual coins were stolen by hackers, the second local exchange targeted in just over a week as cyber thieves exposed the high risks of trading the digital asset.