What is more: the more prominent a domestic currency and the economic area from which it originates, the easier it is for exporters or importers to use their own currency for transactions outside the currency area.
In addition, enterprises benefit from a broad and well-developed financial market, and this kind of market is more likely to exist, the larger and more successful the relevant currency area is and the more trustworthy the currency. It is also easier in a single currency area for enterprises to achieve the critical mass required to be competitive in international trade outside the euro area.