Crypto expert Brian Kelly sparked a debate after suggesting that Solana (SOL) could be the next cryptocurrency to get a spot exchange-traded fund (ETF) in the US. However, industry observers have mixed views. Nate Geraci, president of The ETF Store, believes a spot Solana ETF won’t exist until a Solana futures product is listed or Congress establishes a cryptocurrency regulatory framework. James Seyffart, Bloomberg ETF analyst, thinks a spot Solana ETF would see more demand than every digital asset outside of Bitcoin and Ether. Adam Cochran from Cinneamhain Ventures, however, believes Litecoin or Dogecoin will be the next coin for a spot ETF.