Since bitcoin is not used for anything else, it's not a commodity. It's an asset. Assets that are not used to generate income like machines and are not a commodity being stored have prices that are determined by public perception. Artwork is a good example that is like bitcoin. House prices are halfway between perception and reality. The creditor side of the tally stick is an asset and the debtor side is a liability.
Bitcoin is an asset that can function like a currency and a contract (using its other features). The splintered ends of the tally are a key pair. The debtor end would have be the public key and the creditor key the private key. The ledger of bitcoin is like the public debtor side and the private key is the creditor who paid something "into the system" to obtain the "debt instrument" private key.
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So the bitcoin ledger is a debt "the public bitcoin system" owes to each "creditor" (bitcoin holders). It's a pretty good analogy except the tally sticks were not limited in supply.
But the King was the issuer in Britain - so he limited the supply.