This is why places like USA figured out an alternative, they are not spending tax money to buy, they just seize criminal peoples bitcoins to make sure they are used for reserve. That way nobody pays anything from their pocket, no tax goes there, and yet the nation still ends up with bunch of bitcoins as a reserve. This method is the best for any government out there, seize, and hold.
I wonder what will they do if the number of scams aren't as big as today. Hard to imagine they won't impose higher tax or do something else to get more crypto into their balance books. It's a bit unfortunate that a lot of people still fall for scams. Speaking of seizing criminals, not every government can do that. I think my government would happily seize them if they can figure out where the money goes even if they only allocate 5% of reserve for Bitcoin.