I’ve made the point that money is a tool. It is a technology. It was invented to solve a problem.
Every tool has a level of quality. In the world of hand tools, Snap-on tools are better than Craftsman which are better than Harbor Freight. In the same way, different forms of money have different levels of quality.
We can gauge tool quality in several categories. With hand tools, categories could include physical materials (stainless vs. aluminum), production method (stamped vs. die cast), ergonomics, warranty (lifetime vs. shorter), etc. Money also has natural categories within which we can gauge its quality. I’m calling these the five characteristics of money.