Polymarket, Kalshi and Robinhood offer contracts allowing users to bet on whether bitcoin will rise or fall over 5, 15 or 60-minute periods, with shares priced between 0 and 1 dollar. According to Dune, Polymarket’s five-minute markets generated approximately 2.3 billion dollars in volume between February 15 and March 30, 2026, while their 15-minute counterparts recorded 795 million dollars; automated accounts accounted for 55% and 62% of volume, respectively. A study by Stanford and Singapore Management University estimates that 821 accounts earned 8.2 million dollars through bursts of buying on Binance, with 93% of losses falling on individual users; Polymarket subsequently changed its resolution rules on August 7. The platform also collected 17.8 million dollars in net fees on its rapid crypto markets, but it has been blocked in France since July 16, 2026, and is appealing the decision, while the European Securities and Markets Authority has identified authorization gaps in Europe.
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