BlackRock's iShares Bitcoin Trust (IBIT) has surpassed $70 billion in assets under management, reaching $71.8 billion in only 341 trading days. This milestone establishes IBIT as the fastest ETF to achieve such growth, significantly outpacing the previous record of gold's SPDR ETF. Currently, IBIT holds approximately 661,457 Bitcoin, reinforcing BlackRock's position as the largest institutional holder of Bitcoin and reflecting robust institutional interest in the digital asset.