Bottom line: The U.S. dollar is a global currency against which all others are measured and it is the most traded in the world.
It is backed by the U.S. power in the geo-political landscape, and over recent decades, it has gotten even stronger.
Sixty-five countries have fixed their currencies to the dollar, while 11 countries — Ecuador, El Salvador, Zimbabwe, The British Virgin Islands, The Turks and Caicos, Timor and Leste, Bonaire, Micronesia, Palau, Marshall Islands, and Panama — use it as their official currency.