On October 3, REX-Osprey filed for 21 single-asset cryptocurrency ETFs including staking features, while Defiance submitted for six 3x leveraged ETFs focused on Bitcoin, Ethereum, and Solana. Experts noted the 3x leverage exceeds new ETP regulations, as issuers appear to use options to achieve this. This filing follows the SEC's approval of common listing standards for cryptocurrency ETPs in September, which simplified procedures, but approvals are delayed due to the U.S. government shutdown, putting applications on hold until the SEC resumes operations.