Elliott Management Corp. – an activist investor owned by billionaire Paul Singer – has plans to shake up the management at Twitter.As on Saturday, Elliott has taken a large stake in the social media messaging platform and, according to "people familiar with the matter," has plans to remove as chief executive.The hedge fund has already nominated four directors to Twitter's board, the sources said.Dorsey is also the chief of payments firm Square and has become a darling of the crypto community for his advocacy of (BTC). He recently on Twitter that would display an icon for cryptocurrency if...…Elliott Management Corp. – an activist investor owned by billionaire Paul Singer – has plans to shake up the management at Twitter.As on Saturday, Elliott has taken a large stake in the social media messaging platform and, according to "people familiar with the matter," has plans to remove as chief executive.The hedge fund has already nominated four directors to Twitter's board, the sources said.Dorsey is also the chief of payments firm Square and has become a darling of the crypto community for his advocacy of (BTC). He recently on Twitter that would display an icon for cryptocurrency if...WW…