Payy Link is launching a physical crypto card that enables private, non-custodial spending of stablecoins like USDC using ZK-proofs for enhanced privacy. Early adopters may gain access to limited-quantity physical cards and a future spend-to-earn points program, suggesting potential utility and rewards for users in the crypto payments space. Investors interested in the intersection of crypto and privacy-focused payment solutions should monitor Payy Link's development and adoption.