Polymarket adds to the list of biggest losers: a trader lost $5.8 million in a day
Passions are running high in the world of decentralized predictions. Polymarket, a popular platform for betting on event outcomes, has once again drawn attention with the dramatic downfall of one of its users. In a record 24 hours, a trader under the pseudonym supersob lost nearly $5.8 million, instantly breaking into the top three most unprofitable accounts in the platform's history.
How It Happened
Analysis of the transaction chain shows that the main blow came from a series of bets on matches in the 2026 FIFA World Cup. The most catastrophic was a wager on the Belgian national team to beat Iran. The match ended in a goalless draw, and the trader lost $3.12 million on a $3.1 million investment — nearly all funds were wiped out due to the platform's mechanics, where the losing side loses 100% of the funds staked.
The second blow came from a bet against the Norwegian national team in a match against Senegal. The Norwegians secured a convincing 3-2 victory, resulting in a $2.67 million loss for supersob. An additional wager on a draw in that game brought another $1.15 million in losses. The chain of failures was completed by the France vs. Iraq match, where the trader bet on Iraq's Asian handicap, but the French crushed their opponent 3-0, costing him $1.53 million.
Portrait of a Loser
The statistics for supersob's account look grim. The total negative balance stands at $6.86 million with a trading volume of $16.73 million. Net profitability is minus 41%, and the win rate is only 25%. Out of 12 major predictions, only three were correct. Before this fateful day, the trader's profit chart was steadily rising, peaking at +$4 million, but within a few hours on June 23, the figures plummeted deep into the red.
In the overall Polymarket loser rankings, supersob takes third place. First place is held by the profile 10xBTClong with losses of around $10 million, second by jdsahgf with a deficit of $7.2 million. Slightly below are theRealTaylorSwift (-$6.8 million), tubeyou (-$5.5 million), and anoin123 (-$5.4 million).
Analyst's Conclusions
This case is a vivid illustration of why decentralized prediction platforms remain a high-risk zone. The mechanics of contracts, where the asset price fluctuates from $0 to $1 and reflects mathematical probability, leave no room for maneuver in case of error. Large positions with incorrect analysis result in the total destruction of capital. I would recommend traders, especially in such highly volatile markets as sports predictions, to strictly diversify risks and never invest more than 5-10% of their portfolio in a single event. The story of supersob is not just a piece of bad luck, but a classic example of how excessive confidence and a lack of stop-losses lead to financial catastrophe.