For a long time, blockchain technology was only used as a synonym for Bitcoin. At the same time, the sharing economy became a mass business and the subject of regulatory attention through representatives such as Airbnb und Uber. In the meantime, more and more business models based on blockchain technology are also developing in the sharing economy. It raises the question of regulatory requirements for these businesses. Kai Hindahl examines this question on the basis of examples of decentralized applications.