Tangem to produce physical blockchain banknotes for the Marshall Islands’ digital currency legal tender — Tangem — “Each Tangem card will take the form of a unique physical banknote with secure blockchain-enabled microprocessor inside and combine the familiar advantages of paper banknotes with the security of blockchain technology. These protected notes will be fully transparent, 100% secure, decentralized, and represent a controllable mechanism of currency issuance and circulation for the state.”