According to SPUTNIK, hacker group Anonymous has posted a vicious Youtube message challenging Tesla and SpaceX founder Elon Musk, in which Anonymous blasts Musk for “bullshit” on social media and shakes up the cryptocurrency market. and shook up the cryptocurrency market, saying, “You may think you’re the smartest person, but now you’ve met your match. We’re Anonymous! Expect us.” Later, an anonymous Twitter user also commented on one of Musk’s tweets, saying, “Anonymous is hiding you, what’s your comment?” and included a link to the video above. Later, the user tweeted again, “When Anonymous tweets, Elon Musk is hidden.” At this point it can be noticed that Musk’s Twitter avatar has changed to solid black. Musk has yet to comment on the hacker warning.