I would be worried about about the sustainability issues that this project presents. Additionally, blockchain technology is a rather new concept and people in many parts of the world may not know it. It would be important to see you address these issues in the project brief.
One of the benefits of innovating on this platform was the feedback I got from the organizers and other members of the Open Ideo community. The feedback was key in refining my product. Secondly, since this is a competition, it challenged me to come up with a superior product. The final product is going to be universal and people around the globe have different needs and wants. The problem was reconciling these needs and wants into a single product that will satisfy the global market.