I do understand that altcoins are very much appreciated and accepted globally slowly. But the thing you point out that society is moving closer each day to becoming a globally cashless society is super doubtful. Before seeing fiat as the bitcoin's competition, you have to keep in mind the previous currencies. Golds, silvers, bronze, salt, spices? Those are the trading goods before and the fiat unsuccessfully replaced them.

Sweden being a small country with 11-12 million of population coming up with the plan to stop using cash and go completely onto digital payments is possible. Also the deadline is years away from the present day. Within this if the government plan in the right way they can easily implement the same serving as a model to the rest of the world countries.