Market participants are buzzing with anticipation as major asset management firms scramble to secure regulatory approval for the first-ever spot bitcoin exchange-traded funds (ETFs) in the U.S. Applicants, including Blackrock, Vaneck, Valkyrie, Bitwise, Invesco, Fidelity, Wisdomtree, and the Ark Invest/21shares joint venture all submitted revised filings with the U.S. Securities and Exchange Commission (SEC) on Friday. The first deadline is Jan. 10 for the proposed spot bitcoin ETF by Ark Invest/21shares. Many people are expecting the securities regulator to approve multiple spot bitcoin ETFs by that date.