Elon Musk, who recently joined Twitter’s board of directors, sent a cryptic tweet on Saturday asking whether Twitter is “dying,” coming just days after Truth Social CEO Devin Nunes called Twitter a “ghost town” when asked to comment on Musk’s involvement in the company. Musk, who recently bought a 9.2 percent stake in Twitter that made him the company’s biggest individual shareholder, on Saturday shared a tweet featuring a list of top accounts on the platform, noting in his caption that they “tweet rarely and post very little content.” “Is Twitter dying?” Musk asked. Musk’s surprise move to take a...