Hell to the yeah, he sure as hell is manipulating the market. Just look at his Dogecoin and Bitcoin tweets. They always put each of these coins in the spotlight. Example, look at yesterday's Bitcoin tweet with a broken heart. Bitcoin took a dive after that
Yup, Elon is a business man and he does use the power he somewhat has over the crypto market. Is like seeing a tweet and a few seconds later see how everybody overreacts to it all.
Personally, I find it ridiculous that this is happening and that the space is filled with people who are so reactive but this is why the man keeps on playing with the market - it works and why not capitalise on it!