This move is 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, attracting more traditional investors' interest. If approved by the SEC, the Hashdex ETF could invest in these cryptocurrencies, further increasing their liquidity and market depth, reducing investment barriers, and enhancing accessibility. For portfolio strategies, if approved, consideration could be given to appropriately allocating these altcoins for diversified returns, but attention must be paid to their high volatility and regulatory uncertainty.