A trader on the prediction market Polymarket was accused of exploiting low market liquidity over the weekend to cash out a large sum of money by predicting the price movements of altcoin XRP within a 15-minute window against bot opponents. Here’s how he did it: he aggressively placed bets on XRP price increases in the 15-minute prediction market, regardless of the odds, forcing the bots to sell their positions to him. Then, just before the 15-minute window ended and settlement was about to occur, he intervened in XRP’s price on Binance using approximately 1 million USDT. Although the XRP spot price could only be pushed up by around 0.5%, this was enough to influence the prediction outcome for XRP’s price movement within the 15-minute timeframe. After winning the settlement, he immediately sold off the XRP spot he had purchased. The community later estimated that his actual cost of market manipulation was only around $6,000, but he ended up profiting over $230,000. During the process, some bot opponents noticed something was off and shut down their bots in time to avoid losses. However, other bots were completely drained, losing profits equivalent to about a year’s worth of trading.