Odaily News BlackRock Inc.’s fast-growing iShares Bitcoin Trust (IBIT) has now surpassed one of the largest gold funds in the old-school investment category, with bitcoin exchange-traded funds (ETFs) managing about $34.3 billion in assets as of Friday, according to FactSet data. That puts it ahead of one of the largest gold ETFs, iShares Gold Trust (IAU), which has just under $33 billion in assets under management. However, IBIT is still about $30 billion shy of the largest gold ETF on the market, SPDR Gold Shares (GLD).