Trump's son cashes in on Polymarket as insider-trading accusations mount Donald #Trump Jr. once again draws attention over potential insider trading after investing in the Polymarket betting platform, WSJ reports. 1789 Capital, the investment firm where Trump's eldest son is a partner, is pouring $300 million into the prediction platform as part of a $1 billion round that values the company at $21 billion The deal makes 1789 one of Polymarket's largest