Polymarket's U.S. App Launches 5-Minute Crypto Up/Down Prediction Market

October 28: Polymarket posted on X that its U.S. app has launched a 5-minute crypto up/down prediction market, supporting BTC, ETH, SOL and XRP. Reuters previously reported that the U.S. CFTC is investigating whether Polymarket violated the relevant 2022 agreement barring U.S. users.