The fact that US government could crush bitcoin in no time and the fact that they did not do it despite the fact that it clearly made it onto just about every agency's agenda is proof enough for me that Bitcoin already has the blessing of the US government.
(If you doubt that Bitcoin can still be destroyed, please put into relation the $250,000 economy to the $50,000,000,000 printed every month and what a tiny fraction it would take to pay 1000 smart guys to hack every garage shop bitcoin business, buy 20PH/s ASICS, launch child porn portals operating with bitcoin, etc. The window to shut Bitcoin down will not close until the Bitcoin market value is some orders of magnitude higher.)
What about basic human character flaws such as arrogance, complacency, incompetence, compartmentalization, and a little sprinkle of corruption?
Many government agencies were responsible for the failures on 9/11, despite many warnings. Bitcoin must seem much less important than terrorism to the common man.
IE. 'We can crush bitcoin any time we like'. "Maybe next term'.