As we covered in part two advertising will most likely be the first function to be attacked as blockchain, the technology underpinning Bitcoin, enters the mainstream. Why? Simply put, the number of middlemen and the amount of friction makes it ripe for disruption. The good news, as you can see in the first-ever Blockchain Marketing Technology Landscape, is that there is a lot of whitespace. Most of these categories have no entrants. If you know of one that is missing, feel free to add it here.