-Digital books and kindles replaced library books
-Regular mail was replaced by email
-Previously, we took actual photos; now we take digital photos
-Digital music replaced cassettes and CDs.
-We switched to direct deposit from cash or checks.
How often do you actually have cash? It's rare that I do! The next item on this list is money.
Then... Buy Bitcoins.
In all these examples there is evidence of how the digital version has taken over the previous paper version and how all of these paper-based companies have disappeared.
I agree that money is yet another of these much needed transitions. Crypto seems like a logical option but who knows maybe there could be something else not yet developed... In any case a change to the financial system is but inevitable