World Currency Guide. Know what is happening with the fiat currencies. World Currency Guide The world reserve currency is the US dollar in 2010. How long with American Dollar remain as the world currency is a highly debated topic. Fiat currencies often do not last when they are printed out of thin air. World Currency Guide is a news site that is providing its readers with consolidated information on the topic of world currencies. Worldcurrencyguide.com~Site InfoWhoisTrace RouteRBL Check