Well the world need improvements the weather is changing due to polluition, printed money its a waste of resorces and it should advance into digital moment we are living already, where we can do anything at home from computer and cellphone.
Paper money can be plastic money LOL, I think making money is not tree consuming as before. Government had already learned to recycle used material and recreate it the same like before. Beside, there is another approach to that, there is specific trees that can be use as papers so creating paper money does not necessary mean they are cutting all the trees in the world LOL.
Anyway I agree that the money system need to evolve.