What would the ideal currency look like for the 21st century? It's a question that becomes increasingly pressing as we head into 2026. There are at least five critical unanswered questions we need to grapple with when designing the money of the future. These challenges span everything from technical infrastructure to economic policy, and getting them right could reshape how we think about value, transactions, and financial systems. Whether you're interested in crypto, traditional finance, or the hybrid future between them, these questions deserve serious consideration.