Vitalik Buterin Earned $70,000 on Polymarket and Warns Oracle Flaws Endanger Prediction Markets in 2025

Ethereum co-founder Vitalik Buterin said he made $70,000 on Polymarket in the past year using an "anti-insanity" strategy that bets against highly unlikely events. In a Chiang Mai interview he warned that, despite Ethereum’s scaling progress and rising prediction market volumes, crypto apps risk drifting into pure speculation while critical oracle vulnerabilities still threaten market integrity.