The measures are highly likely to enhance 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 signifies that these altcoins are making strides into the mainstream financial sector, potentially attracting more traditional investors' interest. If approved by the U.S. SEC, the Hashdex ETF could invest in these cryptocurrencies, further increasing their liquidity and market depth, lowering investment thresholds, and enhancing accessibility. For portfolio strategies, if approved, it may be worth considering an appropriate allocation to these altcoins for diversified returns, though one should be mindful of their high volatility and regulatory uncertainties.