Since the dawn of cryptocurrencies, our view of money has changed. Only computer scientists could imagine the digital money that would need no intermediary to be controlled. Only digital rebels tried to create such currency. In 2009, Bitcoin was born, and it resulted in the birth of many other cryptocurrencies that are now a big part of the global economy.Before the Bitcoin, there were many other attempts to create a cryptocurrency. All of them failed. The reason for the failure was the double spending problem. Bitcoin is a truly sensational currency because it solves the double spending problem with the concept of mining and the blockchain.

Practically everyone knows what mining is. Mining is the process of transaction confirmation. Mining is also the process that makes more bitcoin. And the miners are the network users. So, what is blockchain? The blockchain is a decentralized ledger. For bitcoin, it’s a safe book where miners keep the information about the transactions. It’s that simple. But the blockchain itself is a very complex phenomenon and can be used in many different fields