REXShares and Osprey Funds have filed 21 new cryptocurrency ETF proposals, including staking-enabled funds for Cardano (ADA), Avalanche (AVAX), and Polkadot (DOT). The filings, submitted on October 4, 2025, aim to leverage the SEC's updated rules for spot ETFs, which promise faster processing times. The proposed ETFs include ADA + Staking, AVAX + Staking, and DOT + Staking, alongside funds for LINK, LTC, and XLM. These innovative ETFs are designed to integrate on-chain staking rewards into their returns, necessitating specific custodial arrangements to ensure liquidity and security. The move reflects a growing interest in providing investors with diversified exposure to major altcoins while capitalizing on staking benefits.