Prediction markets crossed into the mainstream in 2025, with annual trading volume jumping 4x from $15.8 billion to $63.5 billion. Three dominant platforms: Kalshi, Polymarket, and Opinion, now control over 95% of global volume, each pursuing distinct strategies. However, this rapid growth has outpaced security maturity. The sector has faced third-party authentication breaches, persistent oracle manipulation risks, and admin key vulnerabilities across "decentralized" platforms. Leveraging CertiK's Skynet risk intelligence, this leaderboard helps users cut through the noise with real-time security scores, audit verification, and risk monitoring.