As cash transactions continue a downward slide toward obsolescence and perhaps even illegality, a host of replacement media are being lined-up to replace the practice of making tactile exchanges when completing transactions. Everyone is used to using credit and debit cards, those intermediaries that digitize payments and do account reckoning. But what lies beyond those captured private industry providers like Visa and Mastercard is an even more exotic and potentially far safer monetary transaction system called “blockchain.” This week Ellen talks with Jon Underwood, the founder and CEO of a blockchain-based parallel payment system called C-pay, a system capable of creating local monetary systems as well as addressing some of the payment world’s stickiest markets, like the developing cannabis markets of the American West.