Twitter shares plunged Monday in the first day of trading since Elon Musk abandoned his $44 billion agreement to buy the company – and one tech industry analyst warned of a potentially disastrous long-term scenario for the embattled social media firm. Twitter’s stock sank 11% as investors reacted to the exit. Musk’s move that sets up a lengthy court battle likely to weigh on company shares for months or years to come and added to the challenges facing CEO Parag Agrawal, according to Wedbush analyst Daniel Ives.