Prediction Market Risks Highlighted by Trader Success
While one account profited millions, most retail participants on prediction platforms see losses.
Updated on Oct. 28, 2026 in Investing
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A single pseudonymous user, swisstony, generated $12 million in profits on the prediction platform Polymarket between Q2 and Q3 2026. Data shows that while this account found success through high-frequency betting, the majority of retail users on the platform saw losses.
Why it matters
The analysis highlights the extreme difficulty of achieving consistent returns on prediction markets, where the vast majority of participants wagering over $100 lost money. It underscores the risks of treating these platforms as investment tools, as high-volume participants often rely on sophisticated arbitrage strategies rather than speculation.
The swisstony account placed $657 million in total bets across 184,000 positions, achieving an average return per bet of just under 2% during 2026. In contrast, 68% of users wagering more than $100 on Polymarket lost money during the analysis period.
The players
Polymarket
An online prediction platform where users wager on the outcomes of future events.
swisstony
A pseudonymous account that generated $12 million in profits through high-frequency trading.
The details
The swisstony account profited by accepting existing prices on the platform rather than creating them, allowing the user to capture small margins across a massive volume of trades. Similar to the RN1 account, this required offering standing orders on both sides of the market to identify arbitrage opportunities. Because these positions were recycled frequently, the user could generate significant nominal gains despite a narrow profit margin on each individual bet.
Timeline
April 2026 marked the beginning of the data analysis period for platform activity.
May 2026 saw 115,000 accounts participating in cryptocurrency price betting.
June 2026 began the period of hourly betting activity for the swisstony account.
August 2026 is the estimated date the swisstony account ceased purchasing new shares.
September 2026 participation in crypto-price betting fell to 52,000 accounts.
Money Landscape
The rise of prediction markets like Polymarket reflects a broader shift toward speculative, event-based wagering that mirrors high-frequency institutional trading. This environment remains distinct from traditional investing, with the FT analysis confirming that retail participation is marked by high churn and systemic losses.
Retail participants should recognize that prediction markets are designed for high-volume automated strategies rather than retail investment growth. If you are exploring these platforms, consult with a financial professional to understand the difference between speculative wagering and long-term asset allocation.
The takeaway
Predicting outcomes through betting platforms rarely serves as a reliable vehicle for household wealth creation, as the data shows most participants lose money. Focus your financial planning on established, regulated investment products and review your risk tolerance with a qualified financial advisor.
Further reading
Learn more about the risks associated with speculative markets in our Investing section.
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