Those have been happening for a long time before this, and consist of taking over some some little-known verified account (presumably through phishing, password

Those have been happening for a long time before this, and consist of taking over some some little-known verified account (presumably through phishing, password reuse, and other such conventional means), changeing the (non-unique) display name and profile picture to Elon Musk and doing some bitcoin scammery. The actual well-known accounts are unaffected.