I am among those who believe that Elon is simply an opportunist in the crypto market and that he came into it to make as much profit as possible. With his investments he will try to fluctuate the tokens to acquire and sell, even to get his hands on some or launch them in the future. His opinion about Doge and the investment in it reinforces this. How long he will stay, whether it will help or worsen is difficult to predict, but it is certain that he is someone who seeks money for his projects and will try to get the most out of the crypto market.