Elon is one of whales in Bitcoin market and he can not manipulate it from himself. He has money and capital for investment in Bitcoin. He can get it and get out.

The market is volatile after tweets and investment or Bitcoin acceptance from Elon and Tesla but it is not reason for price jumps or price dumps. It is what people, including other whales take and use it to manipulate the market.

Next 10 or 20 years, who will care about what Elon tweet or what Tesla invest in Bitcoin? No one care in future.