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 
Yes this huge amount of investment should be kept in a safe place .The question is why didn't the investor make sure that his investment is safe?
Hardware wallet is only a cheap investment to secure all of his crypto so why didn't he bought it if he would keep a huge amount of crypto?
I don't think that Hardware Wallet is secured since it can be hack by a spyware or worms and it depends if the antivirus is updated or can detect it since some of the new wares or virus are updated now.
And i think that paper wallet is much secured since you can access it by accessing using the private key. Trezor hardware wallet can be secured if there is an updated antivirus or malware app.