The queen of cryptos: Bitcoin was invented in 2008 by Satoshi Nakamoto. Behind this Asian-sounding pseudonym is an individual or group who invented one of the most exciting technologies of the last decade: the blockchain. This system is defined as a decentralized, immutable and secure peer-to-peer network. Imagine an anonymous and unforgeable public ledger. This technology allows to store and transmit value on the internet in a transparent, secure way and without central control authority. It comes in the form of open-source software and the cryptocurrency attached to it is establishing itself as a leader in the digital currency market. It is considered as digital gold, has no physical existence and does not depend on any central bank. Many experts consider this asset as a way to free themselves from the banking system and the states. Moreover, its creation in 2008 is, for some of them, undoubtedly the consequence of the subprime crisis that affected the global economy. On the other hand, there are many skeptics in the political-financial sphere related to its role as a currency on an international scale.


Bitcoin (BTC) is a cryptographic currency that allows the exchange of value between an A address and a B address. New Bitcoin are issued through mining. Here we are not talking about the miner with his pickaxe to extract precious metals, but rather the Bitcoin miner with his high-powered computer, allowing him to solve complex mathematical calculations and thus be paid in Bitcoin. With this "mining" system, like many other crypto-currencies, new Bitcoins are issued regularly into the network with the "proof of work" protocol. The supply of Bitcoin in circulation, as was planned in the original code by its creator, is limited to 21 million units and this limit is expected to be reached in 2140. The smallest unit of account of the digital currency is the "satoshi" which represents 0.00000001 bitcoin.