Central Digital Currency. Which can be turned on and off, at will, for any particular reason, even no reason given at all. Of course, they would need to kill or continue to abuse the bejesus out of the first four amendments in the Bill of Rights - as they have been doing these past few years.
Create a problem so severe that it terrifies the populace (sheeples) and make them believe that for a skoshy little relinquishing of their freedoms, you can have little perceives security - which they then use to enslave you.
Wish someone had warned about that bait-n-switch tactic back in the 1776 days.