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
Circulation (currency) Circulation (currency) In monetary economics, circulation is the continuing use of individual units of a currency for transactions. Thus currency in circulation is the total value of currency (coins and paper currency) that has ever been issued minus the amount that has been removed from the economy by the central bank. More broadly, money in circulation is the total money supply of a country, which can be defined in various ways always including currency and also including some types of bank deposits. Standard money is the basic currency circulating within a monetary system. It has legal recognition for prices and