This measure is likely to increase the attention and accessibility of altcoins among traditional investors. As a well-known trading platform, Nasdaq's proposal to include XRP, SOL, ADA, and XLM in the cryptocurrency benchmark index means that these altcoins are making strides 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 barriers, and enhancing accessibility. For portfolio strategies, if approved, it may be worth considering an appropriate allocation to these altcoins for diversified returns, but one should be mindful of their high volatility and regulatory uncertainty.