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- Billionaire Don Hankey's company underwrote a $175 million appeal bond for Donald Trump.
- Hankey's net worth is estimated at $7.4 billion and he oversees a $22.5 billion automotive empire.
- Hankey is known for helping finance the Bel Air mansion "The One," which flopped in an auction.
Billionaire Don Hankey swooped in on Monday and underwrote a $175 million appeal bond for Donald Trump, saving the former president from getting his assets sold out from under him while he appeals his civil fraud case.