Biometrics, Blockchains, and Bots with David Birch

Today's show is a special treat because my guest is brilliant and funny and original, and he's also a friend. Dave Birch is a London-based author, advisor and commentator on digital financial services and Global Ambassador for Consult Hyperion. We often run into each other in different parts of the world, and in December we found time to sit down and catch up in London's old City.