Bitcoin is a cryptocurrency that is operated by a decentralized network of users and is independent from the bank. And also it is completely independent from national governments. Bitcoin is backed by source code that uses very sophisticated algorithms to prevent unauthorized manipulation in order to recreate its units. And this is a very reliable indicator of the use of digital money. Due to the fact that he works on the blockchain, it is impossible to crack his code or copy money. Bitcoin is the first known modern cryptocurrency to prove its reliability and open the way for other cryptocurrencies.