Elon Musk's tweets and endorsements have had a significant impact on the price and popularity of Dogecoin. Whenever Musk tweets about Dogecoin or expresses support for it, the price of Dogecoin tends to increase rapidly, often leading to a surge in popularity and trading volume. Musk's influence as a prominent figure in the business and technology world has caused fluctuations in the price of Dogecoin, making it a favored topic among investors and enthusiasts.