Great post! It's probably one of my favorites of yours.

I'm not sure I've ever seen this discussed amongst bitcoiners, but it is how economists learn about and understand money prices.

The problem being solved is that without money everyone would have to keep track of the specific market exchange rates between every pair of goods, which is not something anyone could do. Money prices allow us to understand the relative exchange rates between all goods at a particular time.

All of the relative exchange rates between goods are in constant flux, though, and with value being subjective there's no coherent sense in which money could be a constant unit of value. The same dollar might buy the same basket of goods over time, but how people value the basket changes.