Follow my assumptions in the original post for a second, okay? Then my point is, the current richest person holds at most 0.1% of money supply (yes, only money supply, not overall wealth). In the brightest of all bitcoin futures, someone might hold more than 2% of money supply. So the point isn't that 2% is too much, but that this would constitute a 20-fold increase in relative wealth. That's at least worth thinking about, IMO.
Again, the current richest person (central banks) holds 100% of money supply, and they could increase or decrease the value of money at will