It should not be a surprise to them that are wondering or scratching their head because Tesla and it's founder, Elon Musk believed on bitcoin as a good investment platform. Tesla's currentl btc investment has yielded a good short term profit, though the firm invested on the long term. By some calculation, the $1.5b invested few days a ago has a better return than the firm's one year declared profit. I think scratching may continue because of fear of a btc crash, unfortunately, BTC has come to stay.