Money is simply a tool with five characteristics: durability, portability, divisibility, acceptability, and scarcity. In post #4, we saw that money has three different functions: store of value, medium of exchange, and unit of account.
I’ve made a rubric to help visualize how various monies compare. This point should be emphasized: all measurements or rankings are relative to other forms of money. There is no objective measure. This ranking is also somewhat subjective, though I trust you will see it is fair.