So Twitter was at $70 per share a year ago. So what? Jack Dorsey was CEO a year ago, too. The share price was $33 less than a month ago. But, despite an absolutely incredible roller-coaster news cycle, things have been definitely trending down at Twitter ($33/share last month), which was reflected in its share price. The current executive team (and Dorsey) had wasted time focusing on things that didn't matter instead…
"NO RISK"? There is a very clear risk of transformating the social media titan that is Twitter into Truth Social, a sideshow of a forum that is dedicated to the worship of one man. That would plummet the stock price.
Also the shareholders would get cash, they would no longer own the company at all and the future of the company would no longer be of their concern. Musk could shut it down and it wouldn't matter to investors, they'd already have their money.