This is on point! BTC in general is a threat to bad government. Maybe we will see days when governments are way weaker than today, much more effective, and citizens willingly, voluntarily and happily pay taxes a la ancient Greece.
I believe the current US Gov strategy is to get entities submitting under their control to work in controlling bigger and bigger stakes of BTC. If they outright ban it before it is the case, they will create a scenario where people withdraw their BTC to private holding instead of using exchanges. The only way USGov comes out unscathed is if the exchanges are under its control and they control most of the BTC in the world.
However, I think even this scenario is not ideal for them, as BTC outside the system will be worth differently than the one inside USGov. The question will be which one will be worth more, and the bigger the diffference, the more the other BTC will flow in that direction