The source indicates that the U.S. Securities and Exchange Commission (U.S. markets regulator) has delayed progress on exchange-traded funds tied to prediction markets, and frames that pause as similar to the years-long fight over Bitcoin fund approval. The comparison suggests a familiar regulatory pattern in which novel crypto-linked or event-based investment products face extended review before broader market acceptance. No additional details, dates, issuers, or filing specifics are provided in the source.