Jacob Ner David, A serial tech entrepreneur and longtime wine enthusiast, started his own boutique winery, Jezreel, in the north of Israel in 2011. Jacbob is also the founder of Vinsent a blockchain-based platform for buying and trading in wine futures.Vinsent is offering an app that serves as a digital wine shop and exchange, in which users can place their odds on cases of wine that will not be ready for delivery for months, sometime years. The draw here is a significant discount, offered by participating wineries courtesy of eliminated middlemen.