A trading bot known as 'SellLowBuyHigh' has achieved significant success on Polymarket, dominating nearly 99% of traders in the BTC, ETH, and XRP 15-minute markets. The bot capitalizes on the decentralized nature of Polymarket, exploiting a 3-5 second delay in price updates. It executes over 70 trades daily by purchasing shares immediately after sharp price movements, before market makers can adjust prices. This strategy has resulted in earnings of $124,000 for the bot.