BlackRock filed with the Securities and Exchange Commission on Monday for the iShares Bitcoin Managed Protect ETF. BlackRock said the proposed fund seeks upside exposure to the iShares Bitcoin Trust ETF (IBIT) or similar bitcoin exposure up to an approximate limit, while seeking some downside protection. IBIT holds more than $65 billion in assets under management, according to The Block's bitcoin ETF tracker. Bloomberg Intelligence's James Seyffart said this is BlackRock's third bitcoin ETF filing.