Stephan Noller, serial entrepeneur from Cologne, Germany. Specialized in data-driven business models. Co-Founder of nugg.ad, Calliope, trackle and ubirch. Blockchain enthusiast – ubirch offers a Blockchain for Things, trackle is the first in-body blockchain sensor on the market. Vice president of German Association for the Digital Economy (BVDW) and member of the advisory board of the German Federal Ministry for Economic Affairs and Energy (BMWi).