Reserve currency before the beginning of the worldwide credit crunch related recession and Eurozone crisis, which harmed the euro and slowed its adoption. Since 2009, the reserve currency use of the euro has continued to drop, down to 23.9 percent in 2013. The Dutch guilder was the "de facto" reserve currency in Europe in 17th and 18th centuries. The United Kingdom's pound sterling was the primary reserve currency of much of the world in the 19th century and first half of the 20th century. The emergence of the USA as an economic superpower, and the establishment of the U.S. Federal Reserve System
World currency loan principal – is prohibited by the texts of some major religions. In Christianity and Judaism, adherents are forbidden to charge interest to other adherents or to the poor (Leviticus 25:35–38; Deuteronomy 23:19). Islam forbids usury, known in Arabic as riba. Some religious adherents who oppose the paying of interest are currently able to use banking facilities in their countries which regulate interest. An example of this is the Islamic banking system, which is characterized by a nation's central bank setting interest rates for most other transactions. World currency In the foreign exchange market and international finance, a world currency,