Cboe BZX Exchange has filed for permission from the SEC to list Fidelity's spot Solana ETF.Fidelity is among several asset managers seeking to launch spot SOL ETFs, including VanEck, Grayscale, 21Shares, Bitwise, and Franklin Templeton.Demand for Solana-based investment products is rising following the launch of Solana futures contracts on the CME.The approval of altcoin ETFs could result in wider usage of altcoin ETFs for Americans.