http://worldatlas.i2p/articles/how-many-currencies-are-in-the-world.html
Know About Countries That Use The Euro The Rise of Cryptocurrencies Growth in technology has led to the increase of digital currencies, such as bitcoin and ripple, that are used as alternative stores of value. There are currently over 4,000 cryptocurrencies available in the market, with bitcoin being the most popular and the most highly valued.