On-chain monitoring data shows that an interesting trading anomaly has appeared on a prediction market platform. Three wallets quietly established themselves a few days ago, each pre-depositing funds. Then, just hours before a major political event, these wallets suddenly placed large bets on the related outcome. Ultimately, these three addresses made a total profit of over $630,000 due to their accurate predictions. Based on the creation time of the wallets and the pattern of early fund deployment, it seems to reveal that some participants had prior access to market information. This case once again demonstrates the transparency of on-chain data—no matter how covert the operation, it may ultimately leave traces in blockchain records. Whale behavior in prediction markets often reflects the market’s true expectations of major events, and it is worth paying attention to the logic behind it.