Kalshi and Polymarket hit record $2.7 billion in weekly crypto volume

Short-term Bitcoin price bets pushed crypto to the second most traded category on both prediction markets, behind only sports Crypto-related prediction market volume on Kalshi and Polymarket reached a record $2.7 billion in a single week. Bitcoin price bets did most of the work. That figure makes crypto the second most traded category on both platforms, behind only sports. The record arrived in mid-October 2026. It reflects weekly notional volume, meaning the total face value of crypto-related event contracts traded across the two platforms. The engine behind the surge is a new crop of high-frequency products.