The Euro is the official currency of many European countries, and is used by investors for international transactions. It is also used by financial markets to calculate exchange rates and set prices for securities traded across the continent. The Euro is the second-most traded currency in the world, making it a popular choice for investors. It is also seen as a safe-haven asset, as it is backed by the European Central Bank. This makes it an attractive choice for investors looking for stability, as well as those looking for potential investment opportunities.