The SEC recently postponed the approval of five cryptocurrency ETFs, which isn't too surprising. The SEC is known for its caution, especially when it comes to volatile assets like altcoins; their approach has always been careful. 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 we were to speak about the ETF most likely to be approved, I believe it would be one focused on Solana (SOL). Why? First, Solana's technology has developed rapidly in recent years, with its high throughput and low transaction costs making it stand out in the market, especially in decentralized finance (DeFi) and the NFT space where it has strong use cases. Secondly, Solana's ecosystem is continually growing, with an influx of various projects and developers, making it more 'reliable' than many other altcoins. Compared to some other cryptocurrencies, Solana's stability and innovation may resonate more with the SEC.

If the Solana ETF can be successfully approved, it would truly be a significant breakthrough for the cryptocurrency market, marking the entry of more mainstream and regulated digital assets into the traditional investment realm. As for the SEC's caution, I believe it is precisely to avoid market overheating and regulatory lag, protecting investors' interests and preventing these emerging assets from introducing unforeseen risks to the market. Once this process breaks through, it signals the opening of an investment opportunity; I hope the SEC will expedite the process and provide the market with clear direction.