Internet reports that although it once called Bitcoin an "immature asset class" and considered it inappropriate for long-term investors, Vanguard Group has now become MicroStrategy's largest shareholder. According to Bloomberg, the institution, which manages US$10 trillion in assets, holds 20 million shares of MicroStrategy through its funds, accounting for 8% of outstanding shares, and is likely to overtake Capital Group as the largest shareholder in the fourth quarter of last year.