"It is observable that certain types of financial enterprises, such as large internationally operating insurance companies, tend to migrate to national homes where the national currency is of at least comparatively higher quality..."

In the near future there may be a smaller number of major currencies used in the world and these may stand in competitive relations among themselves. There is now the “euro" and the old history of the Italian Lira is past history now. And there COULD be introduced, for example, a similar international currency for the Islamic world or for South Asia, or for South America, or here or there.~John Nash/Ideal Money