> replace credit cards Small payments for coffee and groceries is a solved problem. We don't need to continue re-solving this problem. Maybe we should think b

> replace credit cards Small payments for coffee and groceries is a solved problem. We don't need to continue re-solving this problem. Maybe we should think bigger. What problems cannot be solved by instant, inexpensive, reversible, censorable, centralized databases operated by corporations and governments that you have to trust? What problems are so big and so vital that only a slow, expensive, government-free, corporation-free, uncensorable, decentralized and trustless source of immutable truth can solve? And before you reflexively answer with "crime", consider whether every activity a corrupt or authoritarian government defines as "crime" is something that truly free people should not be permitted to do.