This section of the exhibition deals With the reasons behind the evolution of money, the factors determining cash mol ement and 110\1 money is being replaced in the 21st century by modern devices. Next to kaori shells, salt and teabricks. precious metals emerges as a suitable tool for barter Metal and coins satisfy lie seven main requirements for flexible and smooth trading. The most important aim is to will and maintain users' (that is to say everybody's) confidence in a given currency.