#FTXrepayment Cryptocurrency is a digital currency used in cryptography for security purposes to protect virtual transactions and control the creation of new units, so it is difficult to counterfeit that currency. It is considered a medium of virtual exchange (electronically) and also a branch of alternative currency. The first cryptocurrency created was Bitcoin in 2009. Since then, other currencies have been created to compete with it, such as Litecoin, Namecoin, and others.