Money, it is conventional to argue, is a medium of exchange, which has the advantage of eliminating inefficiencies of barter; a unit of account, which facilitates valuation and calculation; and a store of value, which allows economic transactions to be conducted over long periods as well as geographical distances. To perform all these functions optimally, money has to be available, affordable, durable, fungible, portable and reliable.
( Niall Ferguson )
[ The Ascent of Money: A ]
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