The direction we're being pulled toward is a cashless one, pretty sure. And an unmistakable part of that involves loss of anonymity. One thing to be used as an argument for making that reality happen, of course, will be security concerns. The guys in sheep costumes who have refused to track and expose funding sources for ISIS will tell us that, which shall provide the biggest laugh.
Bankers are already offering businesses financial incentives to go cashless, so afaik there are now fully cashless restaurants and stores and other places.
And the social-engineering shitshow known as Apple, being the leading troublemaker that they are, has been quietly performing the stunt for some time at many of their stores. A few years back, I remember hearing about someone who couldn't get them to accept his cash until he went to a consumer-advocacy outfit to complain.
IMO this is one of those odd things which may look relatively harmless (or too remote and distant) for most, but it has serious potential to cause everyone to stop and think as it draws toward its breaking point -- which will happen sooner rather than later.