Decentralized betting platforms are not just about hype, but also about extreme financial losses. Another example is a user under the nickname coldsway, who lost a colossal $11.63 million on Polymarket in just ten days. And this is not just a single failure, but a systematic strategy collapse that should serve as a warning for everyone who confuses gambling with investment discipline.

Shocking Numbers

In just that period, coldsway placed 15 bets on 2026 FIFA World Cup matches. However, only 4 of them were successful, resulting in a dismal win rate of just 26.7%. The turnover of funds amounted to an impressive $48.19 million, but the final picture turned out to be catastrophic: 11 losing positions brought a net loss of $15.86 million, while winning trades generated only $4.23 million in income.

It is important to note that each unsuccessful bet was closed with a total loss of the invested capital — not a single partial compensation.

Key Blows to the Balance

The most devastating blow came on July 4. A bet against Morocco's victory resulted in a loss of $4.95 million. Almost equally painful were the bets:

  • June 28 — against Canada's victory (-$3.1 million);
  • June 27 — on Portugal's victory (-$1.95 million).

These three positions together "burned" over $10 million, accounting for the lion's share of the total loss.

Rescuing but Rare Wins

Despite the overall failure, coldsway managed to record a few bright, though insufficient, successes. The most profitable prediction was a bet on a draw in the Australia vs. Egypt match. An investment of $689,000 yielded $1.12 million in net profit, showing a return of 162.4%.

Additional profit came from:

  • Handicap on Colombia (-1.5) — $1.07 million;
  • Croatia's victory on June 27 — $1.07 million;
  • Bet against Egypt's win on July 3 — $963,000.

The total income of $4.23 million was almost four times less than the total losses, leading to the final deficit.

Analyst's Comment: This story is a classic example of how a lack of money management and emotional involvement turn trading into roulette. Even the most accurate predictions won't save you if the risk size per trade exceeds reasonable limits. Polymarket is not a casino, but without a strategy, it becomes one. I advise everyone who enters such platforms to remember: one major failure can negate dozens of successful bets.