Fintech has emerged to address financial challenges of unbanked people and start-ups through open banking, P2P payments, P2P lending, and equity crowdfunding. Beyond inclusive finance, the central challenge, that human societies face in this Anthropocene era, is how to sustain life on earth. Since 2015, there is a global consensus on sustainability (UN SDGs). In this exploratory study, we examine how blockchain technology could improve sustainability. We offer some avenues of future research and policy implications.