Economics is not about things and tangible material objects; it is about men, their meanings and actions.
Ludwig von Mises
Money - A General Definition
Money is any asset which gains general acceptability in performing the
"functions of money".
Functions of money
Medium of exchange
Avoids the inefficiency of barter
Unit of account
Simplifies the expression of an item's value
Store of value
Advantage is "liquidity"
Disadvantages are low rate of return and loss of real value when the price level rises The three most important things a man has are briefly, his private parts, his money, and his religious opinions.
Samuel Butler
 MONEY STANDARD
During the 19th century almost all countries adopted the gold standard. It served as a worldwide standard of value. This function was assumed by gold as a result of its attributes of portability, durability, divisibility, general desirability, stability in value, and high value in small bulk. We'll see later on that some of these features also have to be kept in mind when designing a digital money system.
The choice of the money system is an act of government by legislation or decree. In the system there is a standard money and a unit of account; all other moneys are multiples or subsidiaries of the standard unit. Provision is made for converting any type of money into any other. Coinage has become a state monopoly, and government further controls the money supply directly by legal-tender laws that define the moneys which a creditor must accept when offered by a debtor in settlement of a debt.
It should be clear that the actual circulating media of exchange, e.g., paper money and checks, need not themselves be the standard of value, but they must be expressed in terms of the standard of value in the unit of account, whatever the government may define that to be.
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