The currency means is ?

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The currency means is ? - Means of payment used in economic transactions of a country. For United Stated, the currency is dollars. Once upon a time, primitive man has not used the money, or medium of exchange. This is because by the time that humans can satisfy all the desires of the surrounding night. 

When the natural resources they use up, they switch and start using natural resources around him again. It was only when the emergence of ancient human civilizations began to exchange their property with another person's property, called barter. 

Then after a more advanced age, humans began to use tool exchangers, although not in money. This tool is called the money stuff. It was only after humans mastered the use of writings and letters, dikenallah money or so-called money trust (money fiduciair).

Currency of the world is US Dollars

Conventional economics has made money as a commodity, so the existence of money now more widely traded than used as a medium of exchange in trade. Conventional banking institutions also make money as a commodity in the lending process. The instruments used are interest rate (interest). Instrument using the interest money that has become the land of speculation for many people on this earth. 

Misconception was fatal to the great crisis in the economy throughout history, especially since the early 20th century to the present. Economic various countries in this hemisphere are never out of crises and the threat of the next crisis will happen again.