More than anything else, I feel like we are talking about someone who keeps that much money in their account was the start of the problem. You do not get 68 million dollars worth of bitcoin and keep it all at the same place, it could be few different addresses, it could be few different places, doesn't really matter in the end but you just diversity the security as well. This would have prevented him losing this much, it would have allowed him to protect it. Imagine putting one million into 68 different places, this dude would have 67 million dollars and only lose 1 million in that case, would have been great for him.