BlackRock's Nearly $20 Billion ETF Becomes World's Largest Bitcoin Fund [BlackRock's Nearly $20 Billion ETF Becomes World's Largest Bitcoin Fund] Financial reports indicate that iShares Bitcoin Trust of BlackRock has become the world's largest Bitcoin fund, having accumulated a total of nearly $200 since its US listing earlier this year. asset. The exchange-traded fund held $19.68 billion in Bitcoin on Tuesday, surpassing third-ranked Grayscale Bitcoin Trust's $19.65 billion fund at $11.1 billion, data showed. Since listing, iShares Bitcoin Trust has attracted the largest capital inflow of $16.5 billion, with investors withdrawing $17.7 billion from the Grayscale fund during the same period. Higher fees on the latter and the withdrawal of arbitrageurs are seen as possible causes of capital outflows.$BTC