Digital-asset exchange Quadriga CX has a $275 million problem in that it digital wallets (an application that stores the keys to send and receive cryptocurrencies) appears to have been lost with passing of its CEO. Speculations have been raised whether  this is a scam as funds have been said to be moving on the market despite there being  “no access”.

https://www.smh.com.au/business/markets/crypto-ceo-dies-holding-passwords-that-protects-275m-worth-of-coins-and-cash-20190205-p50vp6.html