Polymarket participants use USDC stablecoin to trade shares on events like Ripple ETF approval.As of July 31, 2025, the chances of Ripple ETF approval have dropped to 22% on Polymarket.However, data for December 31, 2025, shows a more optimistic 83% chance of approval by year-end.Traders show confidence in long-term Ripple ETF approval despite uncertainties in the short term.