This sucks, I see stories like this all the time on here. He really shouldnt have been keeping that amount of crypto online though. It should be on paper wallets or a hardware wallet. Sad for him 
It really sucks indeed but there is a mistake coming from the investor himself for not storing his Bitcoin well. With that huge amount of Bitcoin, he should stored it on a hardware wallet but probably it is stored on a web wallet or online wallet which is his mistake but it is a lesson from him too and for the other investors and holders here.