The U.S. Securities and Exchange Commission's (SEC) delay in approving exchange-traded funds (ETFs) for altcoins such as Solana, Cardano, Litecoin, and Sui has led to a marked decline in institutional interest. Reports from CoinShares and Grayscale indicate significant reductions in altcoin fund flows and liquidity, while Bitcoin continues to see steady inflows. The recent government shutdown has further constrained the SEC's operational capacity, exacerbating the impact on market dynamics. This situation underscores the vulnerability of altcoins to regulatory delays, contrasting with Bitcoin's resilience in attracting institutional investments.