Dogecoin jumped around 20% after Tesla CEO Elon Musk on Friday tweeted, "Tesla merch buyable with Dogecoin." The electric carmaker has started displaying some of its products' prices in the meme-based cryptocurrency on its website, including 'Cyberquad' for kids and Cybertruck-inspired 'Cyberwhistle'. This comes a month after Musk, who is the world's richest person, had revealed plans to do so.