The Bible tells of the mark of the beast. No one without the mark will be able to buy and sell. It's not here yet and a lot has to happen before it does, but the mechanism is rapidly being put in place where it can happen. Some kind of chip under the skin or invisible readable tattoo could be used.

“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.