Crypto-related prediction market volume on Kalshi and Polymarket reached a record $2.7 billion in a single week during mid-October 2026. The figure represents weekly notional volume—the total face value of crypto-related event contracts traded across both platforms.
Crypto trading became the second most traded category on both platforms, behind only sports.
Bitcoin Contracts Drive the Surge
Kalshi's 15-minute up/down Bitcoin contracts generated over $2 billion of the combined total in a single week. Polymarket contributed additional volume through its own shorter-duration crypto markets, with its US arm reporting 15-minute Bitcoin volume of approximately $92 million to $101 million in its first full week of operation.
Broader Platform Growth
The crypto volume sits within a larger expansion at Kalshi. During October, the regulated US prediction market exchange set multiple weekly records across all categories. Peak weekly volume reached $19.03 billion during the week of October 5 to 11. Daily contract volume regularly ranged between $3.9 billion and $4.4 billion throughout the month.
Strategic Shift in Crypto Engagement
The growth in prediction markets comes as spot trading volumes across crypto platforms decline. Prediction market platforms are expanding offerings as traditional buy-and-sell trading no longer generates the same engagement levels. Coinbase and other platforms have begun entering the prediction market space.
Market Implications
Record volume in short-duration event contracts indicates strong appetite for fast, speculative exposure to price moves rather than long-term ownership. Fifteen-minute contracts reward speed and require quick decision-making, with traders expressing views on volatility in small time increments.
For platforms, the numbers validate their prediction market strategies. Kalshi has demonstrated that crypto contracts can drive billions in weekly volume, while Polymarket's US arm has shown it can attract meaningful early activity. Larger industry participants view the demand as sufficient to justify expansion into the space.
