Monywolf said:
There is a distinction between and individual buying vs the government, yes?
Yes - some individuals have investable funds available for buying something like bitcoin, while the government does not (nor should it).
The bitcoin fanboys can relax - no one's maligning your precious crypto, here (I hold 4-5 crypto-related investments myself). There is a time and place for it, but the US government establishing a buy-and-hold or trading position in it is not one of them.
Other than the speculative nature of this proposition (which IMHO the government has no business doing), something like this approach does not serve a multiplicative economic purpose, such as investments in infrastructure or applied research. For each dollar spent in these other areas, the economy is boosted several times more by the economic activity that results. Putting crypto (or gold or plutonium, etc.) in a vault is the opposite of multiplicative, and is not in the best interest of our economy or society.
Pay down the debt, and put money to work!