I really think that there is a real need for physical (paper) money, especially in countries with bad infrastructure.
Is there a way to implement some kind of bitcoin banknotes? The trivial way would be for an entity (government or some other) to print such banknotes and have them backed by real bitcoin. Obviously this requires trusting the issuer, but I am wandering if the banknotes can be made so that you can verify that this particular banknote has its backing and hasn't been redeemed.
I know that many people.are against this idea at all. This post is not about that but what are the technical possibilities. If you can't resist the urge to say "That's a bad idea", please create another post for discussing it.