Spot altcoin ETF flows in the U.S. largely stalled on Tuesday, with XRP-related products the only segment posting fresh net inflows—an early sign that ‘risk appetite' in the alt market is cooling even as crypto ETF infrastructure continues to expand. Data compiled by SosoValue shows U.S.-listed spot XRP (XRP) ETFs recorded a net inflow of $1.26 million on March 25 (U.S. Eastern Time), extending the streak to two consecutive trading days of net buying.