Although he is financially one of the richest businessmen in the world, it is also worth noting that the share prices of his other companies could fall through losses on his Twitter purchase. In my opinion his main mistake was disregarding public sentiment. What is your concern?
We don't know what he was thinking, because we are not the richest people in the world, maybe now what he is doing seems like a mistake to us, but that could be one of his strategies to be profitable in the future and build the world's largest social media. What's more, we know that Elon Musk has succeeded in building SpaceX and Tesla and several other companies, that proves his capabilities as a CEO and in the business world, so I doubt that he will fail in building Twitter.