New accounts deposit $20k to participate in "Short-term BTC Up/Down" and earn 135%

According to PolyBeats monitoring, on the prediction market Polymarket, a new account 0xc40f, after depositing $20k, has only traded short-term BTC up/down markets over the past 12 hours and has currently realized a profit of approximately $27.3k.

Looking at the trading times, this account in the 5-minute market typically buys about 2 minutes before the window ends, rather than in the final seconds, with average prices mostly between 0.34 and 0.49, and each time it takes out a large number of limit orders within the same second; in the 15-minute market, it enters when about 9 to 12 minutes remain in the window.