The death of a person, that held the funds of QuadrigaCX, created a great problem with the exchange, as no-one else has the private keys of the coins to return them to investors. This is another fact that proves, the risks, someone has, if the tokens, are in a wallet, that someone else has the private key. We should not stick to the dangers, of hackers, but we should consider, normal situations, like death. This person, of course, was not expecting to die, as none of us. This of, course, will be a lesson, for the people, who run exchanges, to be prepared, to deal with situations like these.