Ethereum co-founder Vitalik Buterin has disclosed his successful approach on the prediction platform Polymarket, where he bets against extreme and irrational market sentiments. According to NS3.AI, Buterin highlighted the risks associated with oracle vulnerabilities in decentralized prediction markets, referencing a manipulated incident related to the Russia-Ukraine conflict. He proposed that centralized data sources or token-based voting systems could enhance oracle reliability in decentralized finance (DeFi) projects.