Polymarket and Kalshi each set all-time highs in daily crypto-category trading volume on June 2, with Polymarket reaching $176 million and Kalshi $108 million, according to data shared by Artemis. The records came during a sharp crypto market selloff that wiped out more than $1.76 billion in leveraged positions, pushed Bitcoin below $67,000 for the first time since April 2 and erased about $137 billion from total crypto market capitalization. Prediction markets had already been gaining momentum before the spike: Artemis data showed the sector recorded a monthly record $28.4 billion in May volume, extending a four-month run of rising activity, with Kalshi contributing $17.3 billion and Polymarket $8.4 billion. Kalshi has been gaining share across categories and announced on June 3 that Bitcoin perpetual futures are now live on its platform, while Polymarket continues to hold deeper on-platform capital, with DefiLlama showing $535.58 million in total value locked and $488.35 million in open interest. New entrants such as Hyperliquid's HIP-4 are also testing the market as prediction platforms draw more trading activity.