United States spot Bitcoin exchange-traded funds (ETFs) have recorded their largest monthly outflow since the products began trading in January 2024. The development marked a significant shift in institutional sentiment toward the crypto market. According to Galaxy Research, spot Bitcoin ETFs posted net outflows of $6.35 billion over the past 30 days, making it the worst 30-day period among 582 rolling windows tracked by the firm. The record outflow comes as Bitcoin faces a mix of market uncertainty, profit-taking, and shifting investor priorities.