According to @EricBalchunas, IBIT now owns 3.8% of all the bitcoin, and an equity ETF would need about $2.2 trillion in assets to control a comparable share of its asset class. Source: @EricBalchunas. According to @EricBalchunas, SPY owns roughly 1.1% of most stocks despite being 32 years old, while IBIT is still very new, highlighting the unusually rapid concentration of BTC exposure in a single ETF. Source: @EricBalchunas.