I once had this discussion with an economics person and pointed out that if my country moves to a card-only society, then I would move to using USD notes instea

I once had this discussion with an economics person and pointed out that if my country moves to a card-only society, then I would move to using USD notes instead. I'm sure I won't be the only one accepting USD notes as payment. So really either all countries go card only or people just move to other currencies, at least for certain transactions.