Cryptocurrencies are innovative new types of digital money. These currencies are open-source, and no individual or government can own or control them. Since they operate without central authority, they are not subject to the political or economic turbulence of countries. Cryptocurrencies derive their value from their user base; as the demand for a currency increases, so does the price. There is only a limited number of each cryptocurrency in circulation, and new coins are usually created at a predictable and decreasing rate.