I didn’t think of that. all of your wealth and holdings will be nothing but a few megabytes on a server. That means they can fully (and I mean fully) control everyone completely.
Yes, to force compliance they can easily just deny access to electronic cash within a local or a region. They don’t have to take your cash, just deny your access, so then how will you feel about the local political dissidents when you can’t buy a red box movie, hot pocket and 2 liter soda...you’ll be pissed off. (Kidding.)
In such situations, cash, gold, silver, guns, ammo, food or some barterable skill (shoe repair maybe) will quickly be king.
All of your wealth and holdings already ARE nothing but megabytes on servers. Been that way since the 70s.