This move is highly 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 signifies that these altcoins are making strides toward the mainstream financial sector, potentially attracting more traditional investors. If approved by the SEC, the Hashdex ETF could invest in these cryptocurrencies, further enhancing their liquidity and market depth, lowering investment thresholds, and improving accessibility. For portfolio strategies, if approved, it may be worth considering an appropriate allocation to these altcoins for diversified returns, but it is important to be mindful of their high volatility and regulatory uncertainty.