The emergence of cryptocurrencies and blockchain technologies is part of a broader wave of technologies that facilitates peer-to-peer commerce, individualization of products, and flexibilization of production methods. Blockchain technology aims to go one step farther. They organize P2P transactions and P2P information flows without companies that operate digital platforms. Cryptocurrencies are the first and therefore the MOST DEVELOPED application of blockchain technologies. They create money without central banks and facilitates payment without financial institution. Other potential application of blockchain technologies, from smart contracts to decentralized databases and open source social network, could well become more transformational than cryptocurrencies.