He is considered as an influencer because he is famous and have lots of followers but it's not bitcoin, it was doge or shib are the ones that he will promote. Elon already ended its connection with btc because btc is not friendly to the environment therefore there is nothing to worry about.
Whatever happens to those meme coins won't have any effect to bitcoins but manipulations is not all about dumping the price or making it more volatile but pumping can happen as well. Those meme coin hodlers are going to be happy if that happens because finally they can now recover what they lose or possibly earn more but we btc users shouldn't be jealous with that as that is only temporary.
The only reason why people follow Elon Musk is because he is a wealthy person. Anything he says or does with crypto can either positively or negatively affect market prices. Remember when he criticized Bitcoin's high energy consumption? The moment he did, prices went downhill for a short period of time. Right now, he's focused on meme coins like SHIBA and DOGE simply because they're the "new kid on the block" (especially Shiba Inu). Investors pump money into these coins believing they'll get rich quick. But that's not the way it works.
Elon Musk knows the tactic of persuasion, so he uses that to his advantage in order to get what he wants. I wouldn't care about Elon Musk since Bitcoin is all about decentralization. As long as there's a strong community backing it every step of the way, nothing else matters. Just my opinion