The international collective posted a YouTube video, which now appears to have been deleted, following a tweet from Musk about Bitcoin suggesting he was done with it.
A figure wearing a Guy Fawkes mask appeared in the video, beginning: "For the past several years you have enjoyed on of the most favorable reputations of anyone in the billionaire class because you have tapped into the desire that many of us have to live in a world with electric cars and space exploration.
"But recently your carefully created public image is being exposed, and people are beginning to see you as nothing more than another narcissistic rich dude who is desperate for attention."
The group said Musk's 'quest to save the world' was more rooted in a 'superiority and savior complex' than in actual concern for humanity.
They continued: "This has been obvious to your employees for a long time, who have faced intolerable conditions under your command for years.
"You have even prematurely crowned yourself 'Emperor of Mars', a place where you will be sending people to die.
"Your fanboys overlook these issues because they are focused on the potential good that your projects can bring to the world, but you are not the only show in town, and your competition is growing more intense with each passing day."
Anonymous said Musk was simply the only CEO who had gained a cult following through 's***posting and trolling' the world on social media.
The group went on to say that it is widely believed that Musk has been 'forced to denounce Tesla's involvement with Bitcoin' in order to keep 'that green government money flowing into Tesla's coffers'.
They continued: "Millions of retail investors were really counting on their crypto gains to improve their lives.
"Of course, they took the risk upon themselves when they invested, and everyone knows to be prepared for volatility in crypto, but your tweets this week show a clear disregard for the average working person.
"As hardworking people have their dreams liquidated over your public temper tantrums, you continue to mock them with memes from one of your million dollar mansions.
"You may think you are the smartest person in the room, but now you have met your match. We are Anonymous! We are legion. Expect us."
LADbible has contacted Tesla for a comment.
Featured Image Credit: PA/Anonymous