I’d say this is the high school textbook version of the story. Money is simply the “best” medium of exchange in a given context. Stable value and fungibility (“

I’d say this is the high school textbook version of the story. Money is simply the “best” medium of exchange in a given context. Stable value and fungibility (“unit of account”) are attributes that make something better at this role, because it becomes suitable for a wider range of transactions across time and scale. Ludwig von Mises has a lot more to say about this.