Not an exciting topic, but it's one I've often wondered about:
"real" money (coins and notes) are about 2% of the entire money supply in the United States. The rest of it is on the books in banks and other financial institutions, stored electronically. I am assuming it's the same in other developed countries; and for good reason. This of course speeds up commerce, and makes it a little easier on merchants who cannot store as much physical money. It's safer to carry a debit card that transfers a bunch of electrons from your bank's account to the merchant's account directly, at point of sale, than it is to carry around a $h*tload of hundred dollar bills when you want to go shopping. You can also Zelle or Pop money to other people right from your cell phones rather than handing someone a $20 bill when you lose a bet.
It makes me wonder, by when will physical money be dead? Is there still a use for it? Someone from Sweden told me his country is considering a referendum on killing paper/coin money and going 100% digital.
(Pity if so, because I collect it. I've got a whole dictator's hall of fame in my paper money collection. Better snap up some kroner before it's been demonitised.)
This of course doesn't take into account cryptocurrencies like Bitcoin. Still, one wonders exactly what the future of money will be.
I assume it's the same in Canada, people use debit cards more than they use bills and coins with H.M. pretty face on it. Is Canada in danger of going 100% digital?
If so, why do they keep updating money with better (and probably more expensive) security features, changing from paper/cotton to polymer notes? The UK just introduced a new pound coin because the old one was getting counterfeited quite a bit. One wonders why they would do it if they intend to go all-out digital any time this century.
IMO, paper banknotes and coins are still pretty useful. But whether you hand someone a $5 bill, or digitally transfer it to them, it's still all fiat money.