Musk's 'breakup meme' tweet on Thursday night sent Bitcoin plunging Panicked investors took it to mean Tesla is selling off its Bitcoin reserves Musk mocked their fury with another meme of a crying day trader Meanwhile Miami hosted largest Bitcoin conference of the year Jack Dorsey announced Square will develop a hardware wallet for crypto Musk was not on the list of speakers, and it was unclear whether he was invited Animosity toward Musk was on full display among conference attendees