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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.
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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.

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The PlayUSA News Team provides everything you need to know about online casinos, sweepstakes casinos, prediction markets, sports betting, lottery, and all other legal gambling in the US. The content writing process for the PlayUSA News Team includes using an AI application but is edited and fact-checked by real-life humans. No piece of content is published before human eyes take a fine-tooth comb to ensure its accuracy, reliability, and trustworthiness.

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