The unintelligent ones won't be able to adapt and fight to preserve what they have, only postponing the inevitable.
The intelligent ones will takes this time to adapt and preserve their power. Honestly, not even that much intelligence is needed for them to pull that off.
Good point; those who aren't quite so bright will think they have a better chance trying to fight Bitcoin. But that's like trying to fight the Internet; you just won't win, and from what I've gathered about men in power, they're not very tech-savvy, so I don't predict many will attempt to adopt Bitcoin, or even see why it's the path of least resistance. The US dollar's a sinking ship, and those who take the time to understand why Bitcoin is so vital at a time like this will persevere in the end.
Then this poses a completely different question. Once "those in power" realize the potential and shift to bitcoins, will they then try to control bitcoin? They have the money to drive up the market, and at that point they will have the bitcoins to demolish the market as well. So is bitcoin really as distruptive as we think it is? Perhaps this is not only an economic experiment but a social experiment as well. With the goal of understanding the socioeconomic balance of power and just how far "those in power" are willing to go to preserve it. So my original question was not geared towards numbers but social, economic, and socioeconomic implications.