Let's not forget that Vanguard has taken a strong stance against crypto [0]. Claiming to significantly invest in technology while deliberately ignoring the latest advancements in financial technology, seems contradictory. If their business was doing so well, they wouldn't have to lower fees. [0] https://news.ycombinator.com/item?id=42832026
This is for the same reason they don't mix gold ETFs into their indexes. The point of their funds is to track companies that produce goods and services, not asserts and commodities.
[0] https://investor.vanguard.com/investment-products/mutual-fun...