Twitter Inc shares are up 30.4 percent this week after Tesla Inc  CEO and world’s richest man Elon Musk disclosed a new 9.2 percent ownership stake in Twitter and announced on Tuesday joined Twitter’s board of directors. Musk tweeted he is already “working with [Twitter CEO Parag Agrawal] & Twitter board to make significant improvements to Twitter in coming months!” Buyout In Play: While Twitter investors wait on the edge of their seats to see exactly what changes Musk has in store for the platform, Whitney Tilson said Musk’s ownership stake in Twitter likely means a full Twitter buyout is inevitable. “Musk has now put Twitter into play, meaning that someone is going to buy this company. The questions are who and at what price?” said Tilson, the former hedge fund manager and current CEO of Empire Financial Research. He noted the most obvious potential buyers include big tech companies that have mountains of …