Guys, think about it for a while.

To be able to control worlds reserve currency is one of the biggest weapons US has. Why on earth would they be giving that power willingly away? That is just not plausible. Americans would also never ever invent a currency that calls one of its units with a japanese name "Satoshi".

Remember that the people running US are not exactly technological geniuses. Many of the have serious problems even understanding what bitcoin is about. Can you imagine a secret meeting in which some government hacker suggests:

"Hey guys, I came up with this idea! Now this might sound complicated to some of you but it's really great.. Well we can't control our currency anymore if we do this, but please listen the whole story before you downvote! It's based on cryptography which you NSA guys hate, but don't be too fast to dismiss this complicated plan..."

After the long silence, there would probably be a single liner like "Tom, your fired."