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- Elon Musk's ire this year has extended from Mark Zuckerberg to MacKenzie Scott.
- The mercurial billionaire has often fired insults and traded barbs at his contemporaries on X.
- "I have fun sparring with Elon. He likes to troll and so do I," Mark Cuban told BI.
Elon Musk runs half a dozen companies, but the work involved in keeping the Muskonomy humming hasn't stopped him from beefing with his fellow billionaires this year.