Don Tapscott, author of “Blockchain Revolution,” says that the technology underlying Bitcoins could be used to disrupt the likes of Uber and Airbnb. He spoke with Wall Street Journal’s Charles Forelle at the World Economic Forum in Davos, Switzerland. Photo: Getty Images

Why do you need a 60 billion dollar corporation called Uber? You could have a real sharing economy which would be a distributed application on the blockchain. A bunch of autonomous vehicles owned by a company, owned by a community, owned by a City, owned by nobody. And the drivers just post their information on the blockchain – if you need a car, you post it – and the payment system is built in automatically. Same for AirBnB.