Money Is a Commodity Not a Promise to Pay or Fiduciary Media; The Value of a Coin Is Based on the Weight and Fineness of Its Metal Not Its Face Value

Credit money is money that has less than a 100 percent reserve in coins. “If the money reserve kept by the debtor against the money-substitute issued is less than the total amount of such substitutes, we call the amount of substitutes which exceeds the reserve fiduciary media. As a rule it is not possible to ascertain whether a concrete specimen of money-substitutes is a money-certificate or a fiduciary medium.” Fiduciary media increase the amount of money in circulation. “The issue of fiduciary media enlarges the bank’s funds available for lending beyond these limits.”

Money is a commodity, Mises insisted. It is not a promise to pay. Fiduciary media is a promise to pay. It is a promise that cannot be fulfilled at the same time to everyone who has been issued fiduciary media.

The value of a coin is based on the weight and fineness of its metal.

Nevertheless, in defiance of all official regulations and prohibitions and fixing of prices and threats of punishment, commercial practice has always insisted that what has to be considered in valuing coins is not their face value but their value as metal. The value of a coin has always been determined, not by the image and superscription it bears nor by the proclamation of the mint and market authorities, but by its metal content.

--Gary North, Mises on Money (Auburn, AL: Ludwig von Mises Institute, 2012), 23.