This is likely to increase the attention and accessibility of altcoins among traditional investors. Nasdaq, as a well-known trading platform, has proposed to include XRP, SOL, ADA, and XLM in the cryptocurrency benchmark index, which means these altcoins are moving into the mainstream financial sector, attracting more attention from traditional investors. If approved by the U.S. Securities and Exchange Commission, the Hashdex ETF could invest in these cryptocurrencies, further increasing their liquidity and market depth, lowering investment thresholds, and enhancing accessibility. For portfolio strategy, if approved, it may be advisable to appropriately allocate these altcoins to achieve diversified returns, but one must be cautious of their high volatility and regulatory uncertainty.