LOL Elon Musk shilled DOGE but bought BTC with the whole amount of which he dumped on other people in hype. That's clear he is just making fool the people and no interested to hodl this for long term.
perhaps because of his charisma? or because of his good looks? Who knows? lol
The majority of people knows him as the richest guy in the world and that increases the power of his influence to the others especially for the small people.
People take elon as the guy from the future lol and any troll created by him will be taken seriously by people.
His popularity, reputation, achievement plays a lot to influence hundreds thousand of people to follow him.