This is what we call expensive mistake. Imagine, you are one of those lucky people to have Bitcoin at an early stage, but you didn't manage to store your keys on the safe place. There are a lot of people wishing to have invested in Bitcoin during that time but have doubts, then, these two guy did not make an effort to keep it safe.
Well, maybe they really don't expect for Bitcoin, like anyone else, to be this valuable. This is a huge mistake that they will regret forever. All the Bitcoin they hold before will just be a memory.
It is because of this that every single investment decision we take needs to be made with the utmost seriousness, maybe at the time bitcoin was not really worth a lot and those people thought they could simply get away with not taking such a decision as seriously as they could, and now we are seeing the consequences of that mistake, this reminds me of a few lottery winners which were lucky enough to win it but they lost their ticket or it got destroyed due to their carelessness.