The SEC recently postponed the approval of five cryptocurrency ETFs, a decision that isn't too surprising. The SEC has always been known for its cautious approach, especially when it comes to volatile assets like altcoins; they have always been careful, primarily 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 talk about the ETF most likely to be approved, I believe it would be one centered around Solana (SOL). Why? Firstly, Solana's technology has developed rapidly in recent years, with its high throughput and low transaction costs allowing it to stand out in the market, particularly in the decentralized finance (DeFi) and NFT sectors where it has strong use cases. Secondly, Solana's ecosystem is continuously growing, with an influx of various projects and developers making it seem more 'reliable' than many other altcoins. Compared to some other cryptocurrencies, Solana's stability and innovation may resonate more with the SEC.