Cryptocurrency-based prediction market announced it would open store in apparent nod to mayor’s signature policy Cryptocurrency-based prediction market announced it would open store in apparent nod to mayor’s signature policy Zohran Mamdani made city-operated grocery stores a key pledge of his campaign for mayor of New York City. So when one company seemed to muscle in on the idea this week, apparently as a PR stunt, Mamdani was quick to reply. Polymarket, the cryptocurrency-based prediction