A "against" bet on Spain on Polymarket earned a trader $4.7 million: trade breakdown
A user of the decentralized prediction platform Polymarket, operating under the pseudonym fishalive, executed one of the riskiest and most profitable trades in the history of crypto sports betting. He placed $400,000 on the outcome that the Spanish national team would fail to defeat Cape Verde in a group stage match of the 2026 FIFA World Cup.
The odds for this event at the time of the bet were only 9% — the market had virtually no doubt about a Spanish victory. However, the match result fully justified the trader's expectations: the game ended in a 0:0 draw. As a result, the bet converted into a payout of $4.7 million, representing a return of over 1000%.
From a statistical standpoint, Spain controlled possession for 75% of the time and took 27 shots on goal but failed to convert any scoring opportunities. For Cape Verde, this match was their World Cup debut, and the team demonstrated unexpected defensive resilience.
Analysis and Expert Opinion
Such trades are a vivid example of how blockchain-based prediction markets allow for extracting super-profits from low-probability events. In traditional bookmaking, placing such a large bet at extremely low odds would have been nearly impossible due to limits and controls. Polymarket, however, provides complete anonymity and decentralized liquidity, which were key factors in fishalive's success.
My professional opinion: This case clearly demonstrates that prediction markets are gradually evolving into a full-fledged hedging and arbitrage tool for experienced traders. However, beginners should remember: such bets are a "shot in the dark," and only deep analysis or insider information can justify such high risk. In this instance, the trader likely accounted for the psychological factor of Cape Verde's debut and the crowd's overvaluation of the favorite.