I would alter that ever so slightly to say that money is as real as mathematics. Math is an unreasonably effective abstraction that allows us to efficiently and comprehensively describe a wide range of natural phenomena.
Similarly, money is an abstraction that allows us to trade a wide range of goods and services.
Mathematics is more real than money certainly. If we collectively agree that money has no value, it has no value. If we collectively agree that mathematics has no use, it does not stop being an unreasonably effective abstraction for describing natural phenomena.
I would alter that ever so slightly to say that money is as real as mathematics. Math is an unreasonably effective abstraction that allows us to efficiently and comprehensively describe a wide range of natural phenomena.
Similarly, money is an abstraction that allows us to trade a wide range of goods and services.
Mathematics is more real than money certainly. If we collectively agree that money has no value, it has no value. If we collectively agree that mathematics has no use, it does not stop being an unreasonably effective abstraction for describing natural phenomena.