If the answer is "Well his life is in danger because he has lots of money in Bitcoins that can be stolen!" well, then there's another flaw in Bitcoins, or at least in keeping Bitcoins on your own hardware, which is what BTCheads have been advocating since the Mt. Gox 'asploded.
This isn't an issue for a normal rich people, because they don't keep their money in something like paper currency that can be easily stolen. It is in banks. So you break in to their house and kill them... well you don't get any of their money. The bank doesn't say "Oh hey you killed the guy, so by RPG loot rules you get his money!" If that's a concern with Bitcoin because it is like keeping lots of cash on hand, well that's another disadvantage now isn't it?