By Luc Olinga The billionaire has given up a seat on the board of the microblogging website, reigniting speculation about his intentions. Investors have become accustomed to Elon Musk, Tesla’s (TSLA) – Get Tesla Inc Report chief executive, making spectacular announcements. He has a knack for surprising them when they least expect it. But what he seems to like even more is the game of cat and mouse with the business community. The billionaire likes to keep everyone guessing what his next move is going to be. He just proved the point again with Twitter (TWTR) – Get Twitter, Inc. Report. On April…