Will the launch of Grayscale's cryptocurrency ETF have a significant impact on Vanguard, a leading investment management firm known for its index funds and low-cost mutual funds? As more investors seek exposure to digital assets, could Vanguard be compelled to follow suit and offer a similar product, or will they maintain their focus on traditional asset classes? Will Grayscale's ETF provide a compelling alternative for investors looking to diversify their portfolios with cryptocurrency, or will Vanguard's existing offerings remain the preferred choice for many? How might this development shape the future of the investment industry and the role of cryptocurrency in the financial landscape?