What Is Bitcoin and How It's Used

The pretty Swiss lakeside town of Lugano has set out to become Europe’s bitcoin capital, with the aim of attracting bitcoin companies and the cryptocurrency itself to the city. In Lugano, you can still pay for everything in Swiss francs, but in hundreds of shops and restaurants you can also pay in bitcoin. The city has even started accepting it for municipal services. The BBC’s John Laurenson went to check it out.