Currency is a medium of exchange for goods and services replacing the older barter system. In the older times, the exchange between goods and services had no proper foundation for valuing the traded goods and services. It is essentially money issued by the government and is an acceptable form of payment. The modern currency comprises paper and metals in the form of bills and coins. On their own, they are insignificant. The issuing authority and institutions that accept it provide the value; hence it is considered more stable. Countries have developed their currencies over the years based on their standard of living and cost of living.