Wow, this is a fun question!
Well if there was a money tree, this is what i think would happen, if there were many trees.
All the worlds money problems will be solved for a short time but then there would be some serious rise in inflation which would render money as we know it totally useless and a new form of exchange would have to be created.
Every tree would probably have to be destroyed to restore the normal way of living
Generally we will experience a money tree bubble.
Actually this is quite hard... Really it's all up to your imagination. What do you think would happen if there really was a money tree??? Comment below