Currency is a means of payment of economic transactions used in a country.
In the past, primitive man did not use money, or a medium of exchange. This is because at that time man can meet all his desires from the natural surroundings. When the resources they use run out, they move and start using the surrounding natural resources again. Only when the emergence of an ancient human civilization began exchanging property with the property of others, called barter. Then after more advanced times, humans began to use the exchanger, though not yet in the form of money. This tool is called goods money.