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Stock market surges are creating more super-wealthy people. What do they spend their money on? Ed Butler speaks to Noah Kirsch, a writer with the Forbes high-wealth team, about Amazon founder Jeff Bezos, now worth more than $100bn. He visits the London Boat Show to see what kinds of yachts the wealthy are buying. And designer Debbie Wingham describes making the world's most expensive cake.

(Photo: Yachts moored in Monaco, Credit: Getty Images)