The disintermediation made possible by the Blockchain opens the field to multiple applications, capable of upsetting the banking world, but also areas far beyond the financial sector: the actors of health, insurance, real estate education or even music are concerned, among others, up to governments (for official certificates of any kind, or for the question of online voting). Combined with smart contracts (autonomous contracts that run automatically), the Blockchain could see its potential multiply, which would open the way to new issues, including legal. It is essential, for this reason, to promote the transversality of approaches and to bring together academics, economists, lawyers, sociologists and even philosophers alongside more technical profiles in the reflection and construction of Blockchain projects. The important thing is not the Blockchain itself, but what it makes possible. This possible future is that of a more horizontal world.