There are still big questions about the future prospects of cryptocurrencies. Proponents see limitless potential, while critics see only risk. Professor Grundfest remains skeptical, but he did admit that cryptocurrencies are a viable solution in some applications. There are still big questions about the future prospects of cryptocurrencies. Proponents see limitless potential, while critics see only risk. Professor Grundfest remains skeptical, but he did admit that cryptocurrencies are a viable solution in some applications.