According to some “experts,” there is an urgent need to remove cash from the economy. It is held that cash provides support to the “shadow economy” and permits tax evasion. Another justification for its removal is that, in times of economic shocks, which push the economy into a recession, the run for cash exacerbates the downturn—it becomes a factor contributing to economic instability. Moreover, it is argued that, in the modern world, most transactions can be settled by means of electronic funds transfer. Money in the modern world is allegedly an abstraction.
The emergence of money
Money emerged because barter could not support the market economy. A butcher, who wanted to exchange his meat for fruit, might not be able to find a fruit farmer who wanted his meat, while the fruit farmer who wanted to exchange his fruit for shoes might not be able to find a shoemaker who wanted his fruit. The distinguishing characteristic of money is that it is the general medium of exchange. It has evolved as the most marketable commodity. On this process, Mises wrote,
“…there would be an inevitable tendency for the less marketable of the series of goods used as media of exchange to be one by one rejected until at last only a single commodity remained, which was universally employed as a medium of exchange; in a word, money.”
Similarly, Rothbard held that,
Just as in nature there is a great variety of skills and resources, so there is a variety in the marketability of goods. Some goods are more widely demanded than others, some are more divisible into smaller units without loss of value, some more durable over long periods of time, some more transportable over large distances. All of these advantages make for greater marketability. It is clear that in every society, the most marketable goods will be gradually selected as the media for exchange. As they are more and more selected as media, the demand for them increases because of this use, and so they become even more marketable. The result is a reinforcing spiral: more marketability causes wider use as a medium which causes more marketability, etc. Eventually, one or two commodities are used as general media—in almost all exchanges—and these are called money.
Since the general medium of exchange emerged from a wide range of commodities, money is a commodity. Again, according to Rothbard,
Money is not an abstract unit of account, divorceable from a concrete good; it is not a useless token only good for exchanging; it is not a ‘claim on society’; it is not a guarantee of a fixed price level. It is simply a commodity.
Moreover, in the words of Mises, “…an object cannot be used as money unless, at the moment when its use as money begins, it already possesses an objective exchange value based on some other use.” Why must this be the case? Rothbard explains further,
In contrast to directly-used consumers’ or producers’ goods, money must have pre-existing prices on which to ground a demand. But the only way this can happen is by beginning with a useful commodity under barter, and then adding demand for a medium to the previous demand for direct use (e.g., for ornaments, in the case of gold).
Hence, money is that for which all other goods and services are traded. Through an ongoing selection process over thousands of years, people settled on gold as money. In today’s monetary system, the money supply is no longer gold, but coins and notes issued by the government and the central bank. This fiat-money still has exchange-value because of its prior connection with true money and the inertia caused by the fact that it is already accepted as a general medium of exchange. Consequently, coins and notes still constitute money, known as cash, which are employed in transactions. Goods and services are exchanged for cash.
Hellbound and Down 
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