Missing the forest for the trees. Those three functions of money are the “cliff notes” description of money, but there is a deeper abstraction that all of those

Missing the forest for the trees. Those three functions of money are the “cliff notes” description of money, but there is a deeper abstraction that all of those properties can be derived from: money is a ledger. In the case of cash or bitcoin, the ledger has a constraint that negative balances are not allowed.