The SEC recently postponed the approval of five cryptocurrency ETFs, and this decision is not particularly surprising. The SEC has always been known for its caution, especially when it comes to volatile assets like altcoins; their attitude has always been one of carefulness. After all, they are more concerned that the entire cryptocurrency market is not yet stable enough and that the regulatory framework has not fully kept up. However, if I were to say which ETF is most likely to be approved, I believe it would be one centered around Solana (SOL). Why? First, Solana's technology has developed rapidly in recent years, and its high throughput and low transaction costs have made it stand out in the market, especially in decentralized finance (DeFi) and NFT fields where it has strong use cases. Secondly, Solana's ecosystem is continuously expanding, with a surge of various projects and developers making it more 'reliable' than many other altcoins. Compared to some other cryptocurrencies, Solana's stability and innovation might be more appealing to the SEC.