Polymarket Trader Doubles Fortune to $9M After Spain World Cup Shock Draw

A newly created account, just days old, reportedly turned around $4 million into roughly $9 million by betting against Spain, prompting on-chain analysts to question whether the trade was pure luck or based on non-public information.

In a major World Cup upset, debutants Cabo Verde held tournament favorites Spain to a 0–0 draw on Monday, producing a huge payout for bettors who had heavily favored Spain, with pre-match odds around 1:10 against the underdog.

The result created two of the most extreme outcomes seen on the Polymarket prediction platform this tournament. According to data reviewed by CoinDesk, a fresh wallet generated more than $9 million in profit within hours after starting with about $4 million in capital. At the same time, another trader suffered losses of nearly $1 million on a position that would have paid only around $85,000 if Spain had won.

Cabo Verde, making its first World Cup appearance with a squad lacking major international stars, faced a Spain side considered one of the tournament favorites and reigning European champions. Veteran goalkeeper Vozinha, aged 40, was named player of the match.

On-chain analytics firm Lookonchain reported that the winning wallet, “fishalive,” created this month, placed two key bets against Spain: one predicting Spain would fail to win outright, and another on Cabo Verde covering a +2.5 goal spread.

Both positions paid out after the match ended 0–0. Public records show the wallet collected around $4.7 million from the outright market and $8.5 million from the spread, resulting in an estimated profit of about $9 million in a single day.

By contrast, another user known as “betoor619” lost close to $1 million after betting heavily on a Spain victory when the market implied about a 92% chance of success. Had Spain won, the payout would have been only around $85,000, reflecting the low returns typical of near-lock bets.

That account’s previous trading history reportedly showed no single gain or loss exceeding $9,000, highlighting the scale of the unexpected loss.

Polymarket operates as a prediction market where users trade shares tied to real-world outcomes, with prices reflecting implied probabilities and settlements conducted in USDC on-chain.

Traders use crypto wallets under pseudonymous identities rather than verified names, a structure that has drawn regulatory criticism due to the lack of identity checks compared with traditional sportsbooks.

Roughly $64 million was wagered on the Spain match alone, while Polymarket’s World Cup winner market has seen about $2.4 billion in total volume—surpassing its activity during this year’s Super Bowl and ranking just behind last year’s U.S. election cycle.

Despite the transparency of on-chain settlement, the anonymity of wallets means large moves can be tracked in real time without revealing identity. That has fueled speculation around how a newly created account was able to take such a large, well-timed position against a heavy favorite.

As a result, the mysterious trader behind “fishalive” is already attracting attention and a growing following, with many watching to see whether the winning streak continues.

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