A lot of the U.S. power comes from our currency and its stability(relative to the rest of the world). To challenge this would mean an increased risk, both financially and militarily. That being said, I think instead of attacking this rising trend, maybe an open(more likely not-so-open) discussion is needed from many branches of the government and a lot of simulation to assess systemic risk.
Interesting, considering the #1 entity that's challenging the US Dollar is the government. You make it sound like Bitcoin is suddenly grounds to be concerned about the future of the dollar while the government has been pilfering its worth for decades.
