PARIS: A meme-inspired cryptocurrency's price jumped on Tuesday (Apr 4) after Elon Musk changed the bluebird logo of Twitter to a dog associated with the digital token, despite the mogul being sued over his previous promotion of the coin.Musk bought Twitter in October last year for US$44 billion and has since slashed its workforce, introduced paid-for accounts and reinstated banned users including former United States president Donald Trump.His decision to change the logo to a Shiba Inu dog, whether permanently or as another short-lived joke, caused the price of Dogecoin to surge by more than 20 per cent, from below US$0.08 to more than US$0.10.The Twitter chief has 133 million followers and has long used the platform for self-promotion and humour, occasionally also promoting Dogecoin, a highly volatile cryptocurrency initially created as a joke.He is being sued for US$258 billion by an investor who claims that he lost massive amounts of money because of Musk's activities, though the billionaire has dismissed those claims.The Shiba Inu dog became a popular meme in 2013 when posters on forums like Reddit and 4chan began using pictures of the Japanese dog breed alongside messages written in broken English.The cryptocurrency was launched as a joke later that year and remained largely without value for years - like thousands of other coins.However, in May 2021, its value briefly spiked to a record US$0.73 after Musk suggested that his auto firm Tesla could begin to accept it for payments.The value quickly slumped and investors have accused Musk of manipulating the value of the token to make a quick profit, known as a "pump and dump".Musk has said that he is committed to crypto and that he pumps but does not dump.The logo