The SEC's Twitter account was hacked, falsely announcing a Bitcoin ETF approval, which led to a temporary drop in Bitcoin's price. The FBI is investigating the incident, and the SEC clarified that official announcements are only made on their website and the Federal Register. The hack was due to an individual gaining control over a phone number associated with the SEC's account, which lacked two-factor authentication. Critics of Bitcoin ETFs, like Dennis Kelleher, reiterated their stance against the cryptocurrency.