A trader on Polymarket lost $5.8 million in a single day: the story of one collapse
A landmark event has occurred on the decentralized prediction platform Polymarket: the list of the most losing traders has been joined by a new participant. A user under the pseudonym supersob lost nearly $5.8 million in just 24 hours. This failure instantly propelled him to the third spot on the platform's all-time anti-ranking.
The collapse revolved around bets on 2026 FIFA World Cup matches. supersob placed several large wagers that went against reality. The key blow came from the Belgium vs. Iran game. The trader bet $3.1 million on a Belgian victory, but the match ended in a goalless draw. As a result, he lost $3.12 million — virtually the entire investment amount.
Next came a bet against Norway in their match against Senegal. supersob did not believe in a Norwegian victory, but they confidently won 3-2. The loss on this position amounted to $2.67 million. An additional bet on a draw result added another $1.15 million in losses. The streak of failures was capped by the France vs. Iraq match. The trader chose an Asian handicap for Iraq, but the French crushed their opponent 3-0, costing supersob another $1.53 million.
Anatomy of a Failure
Before this fateful day, supersob's profit chart was steadily rising, peaking at a positive $4 million. However, within a few hours on June 23, the indicators plummeted to a critical negative. The trader's total negative balance now stands at $6.86 million, with a turnover of $16.73 million. His prediction accuracy is only 25%: out of twelve major predictions, only three were correct.
In Polymarket's list of biggest losers, the first place is held by the profile 10xBTClong with losses of about $10 million, second is jdsahgf with a negative $7.2 million. Below them are theRealTaylorSwift (-$6.8 million), tubeyou (-$5.5 million), and anoin123 (-$5.4 million). This dynamic clearly demonstrates how the platform's contract mechanism — where the price fluctuates from $0 to $1 and the losing side loses all funds — turns major mistakes into a catastrophe.
Expert opinion: The story of supersob is a classic example of how excessive overconfidence and a lack of diversification can ruin even experienced players. Polymarket is not a casino, but a market of probabilities where mathematics and cold calculation should prevail over emotions. Traders should remember: one mistake with million-dollar bets can erase months of successful work.