Mommy, Where Does Money Come From?

And how Tokens come again to the pool: from Students (purchases), Teachers and Companies.

To summarize this view, the foundation of the human economy is built on bartering and swapping for mutual benefit: it makes us human, and let us specialize. Money and coinage evolved as an abstract representation of scarcity, in order to facilitate that bargaining. And then credit and banking evolved on top of that.