Elon Musk has finally completed his expensive bid to own Twitter. After months of back and forth, the world’s richest man paid $44 billion (€44 billion) for the social media platform. He celebrated the fact with a typical pithy response, tweeting a video of him arriving at the firm’s San Francisco office carrying a sink with the caption “let that sink in!” Since the deal was made official, he tweeted that “the bird is freed”. He also promptly fired three of its top officials. No hard feelings there then. For those who haven’t been following the twists and turns of Musk’s attempts to buy the pl…