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If Musk actually retires as Twitter boss, there are already a few candidates who could become the new “Head of Twitter”. Investor Jason Calacanis (51) is the favorite. When Musk asked him during negotiations if he would like to be his strategic advisor if the Twitter deal went through, Calacanis pledged allegiance in a text message: “Board member, advisor, whatever… You have my sword,” wrote Calacanis. “Put me in, Coach! Twitter CEO is my dream job.”´