Worse still, the shady beginnings of Bitcoin mean we have no real idea anything about people who could end up richer than all the plutocrats in history put together. If these people ever got the world they wish for (Bitcoin economy worth many trillions and dominant online and ubiqitous in real world transactions) we'd could be in a situation even worse than we are now.
Not really. Just because they're wealthy doesn't mean they'll take over governments and such.
No, but the point is we don't know one way or the other.