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Young Traders Lose Thousands on Kalshi and Polymarket: What You Need to Know

People deciding to take out event contracts on prediction markets need to understand that most firms lack guardrails to protect bettors
Prediction markets lack protections for problem gamblers.
Photo by Chan2545/Shutterstock
Ian St. Clair Avatar
2 mins read
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State of Play

  • Prediction markets such as Kalshi and Polymarket have led some young users to lose thousands, spotlighting gaps in consumer protections.
  • As regulators and addiction experts push for safeguards, bettors should weigh the risks and watch for incoming rules that could change how these products operate.

Two recent first‑hand accounts underline how quickly event contract losses can mount.

Lorenzo Miro San Diego, who first found Polymarket after seeing it on “South Park,” won an early $498 college football bet but ultimately lost more than $1,700 across sports and crypto‑price wagers. He has since filed a lawsuit against Polymarket.

Separately, a 24‑year‑old Virginia engineer identified as K.A. posted screenshots showing more than $10,000 lost on Kalshi during an eight‑day streak after escalating stakes and taking loans to chase losses.

Problem gambling experts, including Susan Sheridan Tucker, warn that prediction markets often lack guardrails – like clear loss limits and prominent addiction resources – that traditional sportsbooks must provide, increasing potential harm for inexperienced users.

Prediction markets lack safeguards

The consequences of wagering on prediction markets are financial and behavioral. The National Council on Problem Gambling estimates millions meet criteria for gambling problems. Platforms that facilitate fast, ad‑driven access – often targeting younger users – can accelerate harmful patterns such as chasing losses and leveraging other assets to fund bets.

Economically, these markets are fast‑growing. Independent estimates put Kalshi’s fees at about $263.5 million last year and Super Bowl event volume near $1 billion on Kalshi alone.

Operators argue these products are financial instruments and claim they’re fairer than sportsbooks. Regulators and researchers note most users still lose money and that median losses may range from roughly 1% to 7% of balances.

Practically, the gulf in responsible gambling protections matters. Some firms now offer voluntary limits and telehealth partnerships, while others show no visible problem gambling resources or plan features such as margin trading, raising operator exposure to litigation and regulatory scrutiny.

The Commodity Futures Trading Commission has signaled it will draft rules for event contracts, a process that could take months to more than a year. Advocacy groups want prediction markets to publicize the national gambling helpline (1‑800‑MY‑RESET) and adopt self‑exclusion and warning labels.

Based on reporting by Jack Newsham for Business Insider.

About the Author
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Ian St. Clair

Content Lead

Ian St. Clair is a lover of words, vocal or written. Naturally, that makes Ian a great communicator and leader. Ian is curious and driven, always looking to improve, and always welcomes a challenge. Ian is authentic, possesses high-level emotional intelligence, and knows just when to crack a joke. A University of Northern Colorado graduate, Ian is now an expert in the US online gambling field, where he's been for over 5 years. Ian also has over a decade of journalism experience covering college and professional athletics, as well as the symphony and theater. Ian's a lover of history, news, and bacon. Oh, and tacos.

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