In classic HN fashion, everyone disagreeing with this is focused on their own solipsistic perception of the relative merits, technical and otherwise, of cash versus electronic payments. But convenience always wins.
The not-yet-evenly-distributed future is represented by Apple Pay on the Apple Watch. You literally wave your wrist over a point-of-sale terminal and confirm on the screen. Once this experience is cloned and brought downmarket by a combination of Android, Fitbit, and no-name Chinese manufacturers on Amazon, very few will go back even to pulling out credit cards, much less enduring the complications of cash.
We need better legal protections for electronic payments and banking. Cash, for better or worse, is on the way out.