A cashless society I will only ever come once human nature fundamentally changes. Say Canada gets rid of physical currency, the very next day people will use Am

A cashless society I will only ever come once human nature fundamentally changes. Say Canada gets rid of physical currency, the very next day people will use American money to buy things like drugs or stuff they don't want on their credit card like sex toys. Make a law against using other currencies and the market will just move underground. Even if every country eliminated paper money there will always be a way of exchanging high priced commodities, at which point the prevailing choice will become cash.