It is like talking about money in the computer network worldwide, it is also called a digital medium of exchange that uses strong cryptography to ensure transactions between different natural, moral or legal persons, it is considered that in the future it becomes an asset or universally accepted as a means of payment of any person who participates in the economy worldwide doing any kind of economic activity the best known cryptocurrencies are bitcoin, ethereum, Tether, litecoin, etc. Cryptocurrencies do not physically exist as digital currencies.