Trading In Currency

currency
The fact or quality of being generally accepted or in use
The time during which something is in use or operation
the metal or paper medium of exchange that is presently used
A system of money in general use in a particular country
general acceptance or use; "the currency of ideas"
currentness: the property of belonging to the present time; "the currency of a slang term"

trading
buying or selling securities or commodities
The action of engaging in trade
(trade) the commercial exchange (buying and selling on domestic or international markets) of goods and services; "Venice was an important center of trade with the East"; "they are accused of conspiring to constrain trade"
(trade) engage in the trade of; "he is merchandising telephone sets"