OK, look like you are going to be a bit busy reading plenty of papers. Anyway, my suggestion would be a thesis focused in microeconomics. I would try to understand what would happen if a software like Bitcoin was used as medium of exchange to support the local markets. E.g. How could a community of farmers use a software like Bitcoin to help them to supply their goods to a specific area. That would facilitate distribution of the goods? Less incurred fees for the final consumers? That helps the farmers to increase their capital and consequently they capacity to keep the supply steady?