Bitcoin Swings, Dogecoin Wobbles, But Crypto Keeps Growing On 4/20/21 at 3:42 PM EDT Or so it seems. Elon Musk said he'd invested $1 billion in Bitcoin and would accept it as payment for his electric cars, sending the cryptocurrency higher. Mark Cuban said he'd take Dogecoin from fans buying team merchandise for his NBA Dallas Mavericks. Dallas Mavericks Mark Cuban smiles during the game between the New York Knicks and the Dallas Mavericks at Madison Square Garden on January 30, 2019 in New York City. Photo by Elsa/Getty Images In any case, many investors buy and hold Bitcoin as a bet on future price appreciation.