Good points you brought up. Agreed. My thoughts? Underground economy, unreported mattress money may be flowing into bitcoin (like silver in the 1970s). Then the gov’t does something to crash that market, and all or most, of the “play money” evaporates.
Its helps the Fed sop up some excess money supply from the system, (and punish cheaters) so THEY can ADD more money to the money supply themselves. Gives them room to add. They go by numbers.