In the past eight years, more than a third of all cryptocurrency exchanges have been hacked. The total losses exceed US$1 billion.
source https://www.google.com/url?rct=j&sa=t&url=https://ponderwall.com/index.php/2019/03/17/australia-cryptocurrency-hack-coincheck/&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNFzJke3j-0FLgBc4ESLFzjlVMjw2g
