If trees produce paper and money is made of paper cant money grow on trees?

Okay, money is not, in any real sense, "made of paper". Sure, it's printed on paper (though calling the substance money is printed on "paper" is a bit misleading, because there's actually a large amount of cotton present in that "paper". But, what makes money money is the fact that the government proclaims it to be "legal tender". So, in the only sense that matters, money is made out of government proclamation, not paper. Moreover, trees do not produce paper directly. They produce wood. Humans produce paper by processing the wood (and, in the case of the paper used to print money, cotton as well). And humans make money by printing numbers, Words, and the pictures of dead Presidents on the paper. The biological processes going on inside a tree, complex as they are, cannot duplicate these human processes. So, "money", even if it was nothing more than the paper and ink that went into physically producing the bills, still could not grow on trees.