The project of European economic and monetary union is unique in its range and depth. The new member states were not granted an opt-out clause and that is why they are obliged to become part of the euroarea in the future. Therefore any experience of those EU member states which already adopted the euro should be useful for them. Particular most useful lessons may be learned from the experience of Greece as these countries share some common features. From this reason more detailed study of EMU and single currency and their effects on Greek economy may be worth.