The article considers the drawbacks of modern monetary-currency systems and their nonconformity to the requirements of current and future technological possibilities of the most world’s countries is concluded. It is substantiated that the principle of benchmarking of currency purchasing power unit in modern monetary-currency systems causes such nonconformity. The evolution character of changing one another benchmarking methods of purchasing power is discussed. The classification of money types and monetary system classes according to a joint classification attribute: benchmarking method of purchasing power, is offered. The hypothesis of the existence of the law describing the correlation between the benchmarking method of currency purchasing power and the economic-technological civilization development level is grounded. The conclusion is drawn that a new type of virtual money with a constant purchasing power has to emerge as the result of this law effect at the national level. At the international level, in future the same demand for correspondence will firstly bring about the making up of supranational units of account of regional and political alliances of countries and then the emergence of supranational world’s currency with a constant purchasing power.