In the case of The United States then you are correct, The U.S. does not own stocks on its balance sheet.
I was simply making a point about hypocrisy, how The Government Buying Bitcoin is "Good" according to some, while The U.S. making a Sovereign Wealth fund, or other similar practices would be considered Bad by those people.
Generally speaking, I see Bitcoin as money meant to be utilized, and spent, not as some scarce rock that everyone has to be paranoid about, and "HODL" indefinitely.
Bitcoin is valuable money but one that needs to circulate.