The concept of “currency” designates the cash that is used in international transaction, other than the one used for national transactions. Foreign currency is, practically, the national “coin” of another state or the “coin” used by a monetary union of some states. While the monetary policy of a state represents a set of measures meant to ensure the internal stableness of a national currency, the currency policy is a set of measures being taken to ensure and maintain the stableness of the national currency at a foreign level. The virtual currency is, according to ESMA (European Security and Market Authority), “the virtual representation of the value, which is not issued by a central bank, credit institution or institution of electronic currency, and which can be used as an alternative to the legal currency in certain circumstances”.