Group 1 - Bitcoin Exchange Traded Funds (ETFs) have recorded net inflows of $26.9 billion in 2023, with BlackRock contributing $28.1 billion, indicating its dominance in the market [1][2] - Without BlackRock's involvement, Bitcoin ETF flows would have been negative, highlighting the firm's significant impact on the sector [2] - BlackRock has opted not to participate in the current altcoin ETF wave, raising questions about the future of these funds without its backing [2][3] Group 2 - Several asset managers, including 21Shares, Canary Capital, and Fidelity, have filed for altcoin ETFs with the SEC, while BlackRock has not pursued similar filings [3] - The altcoin ETFs are awaiting SEC approval, with VanEck filing for the Lido Staked Ethereum ETF and Bitwise Asset Management submitting an S-1 for a Chainlink ETF [4][5] - The altcoin ETFs are designed to utilize standard creation and redemption mechanisms, with a focus on processing both in-kind and cash transactions [5]