The SEC has delayed its decision on Grayscale’s Solana (SOL) ETF until October 2025, following its standard 240-day review period.Investors are optimistic about approval for Solana and Litecoin ETFs by year-end, with an 82% probability for Solana and 80% for Litecoin.The approval of spot Solana ETF could drive institutional adoption and unlock significant capital, similar to the impact of spot Bitcoin ETFs.In June, the SEC is expected to make decisions on ETF proposals for Polkadot, XRP, and Dogecoin, among others, though further delays are anticipated.