Bitcoin is the pioneer. Instead of relying on physical properties (like gold) or central authorities (like € or $), it relies on the most powerful and secured network of computers. This makes it the first truly digital and decentralized form of cash.

The whitepaper was released in October 2008 and the first transaction was sent in January 2009. Bitcoin is the most famous cryptocurrency and even accepted for payment by some companies (e.g. Microsoft) and countries (e.g. El Salvador).

Bitcoin is mainly used as a digital currency for online marketplaces, to pay for transactions on its blockchain and as a speculative store of value.