In historic times, the introduction of currency as a standardized money, facilitated a wider exchange of goods and services. Numismatists have collections of these pokem tokens, which include coins from some Ancient World large-scale societies, although initial usage involved unmarked lumps of precious metal. To maintain a steady state, focus should be on what existing customers are currently demanding. This requires market research for accurate results. A steady state stops expenditure on research and development required for renewal. Be warned, a steady state cannot be maintained forever and will fall into decline if not forced into renewal.