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They saw a world where anyone could bet on anything. At 21, they built it. Now, Kalshi & Polymarket's founders are revolutionizing prediction markets. This is how they're changing finance forever: Tarek Mansour and Shayne Coplan, both 19 at the start, saw what others missed: prediction markets were the key to forecasting the future. Despite legal challenges, they found creative solutions. Tarek built Kalshi using traditional finance, while Shayne created Polymarket on blockchain. Their platforms faced criticism and regulatory scrutiny but achieved incredible accuracy—predicting COVID waves, Biden’s 2020 win, and inflation rates better than experts. The secret? Real-money bets reveal true beliefs, not just opinions. In 2020, Kalshi earned federal approval, and Polymarket attracted top investors. Together, they’ve traded over $100M, proving prediction markets can reshape decisions in policy, science, and tech. These two are redefining the future. Follow for more content.