Kalshi and Polymarket have captured 99% of the prediction market, with Kalshi's share increasing to 66% following its partnership with Robinhood. The demand for price predictions is escalating, particularly in sports betting, as the market is projected to reach $40 billion by 2025. Kalshi, regulated by the CFTC, is leveraging mainstream access, while Polymarket focuses on institutional data requirements. Additionally, Bitcoin price prediction markets are gaining popularity on both platforms.