Under the glass on my study table, I have 70 paper currencies, plus one coin that is not shown here. Six of those currencies no longer exist, either because the country itself no longer exists, like Yugoslavia, or because the country later switched to another currency, like the euro. The remaining 64 currencies span 107 countries, since a few of them, like the euro, the U.S. dollar, and the East Caribbean dollar, are used in multiple countries.