Elon Musk has had a longstanding and often playful relationship with Dogecoin, a cryptocurrency that was created as a joke based on the popular "Doge" internet meme. Musk has tweeted about Dogecoin on several occasions, sometimes causing significant price fluctuations in the cryptocurrency.
In December 2020, Musk tweeted "One word: Doge" which caused a surge in the price of Dogecoin. He also tweeted several other times about Dogecoin, including a tweet in February 2021 that simply said "Doge" and another in April 2021 that said "Doge Barking at the Moon."
Musk's tweets have helped to bring attention to Dogecoin and have contributed to its growing popularity, with some people referring to Musk as the "Dogefather." However, it's important to note that Musk's tweets should not be taken as financial advice, and investing in cryptocurrencies can be risky.