They then use those items and borrow cash against them as needed. Think about some the large property companies. Renting property is a pain to do. Yet some of these companies are huge and have millions of dollars they are floating. Why? Because the owners borrow against them to fund their other ventures. Then use the profits of that to pay off anything they borrowed.

Ownership of things that have actual value is the number one way to becoming wealthy. Owning flashy toys and extravagant dinners all the time is a quick way to spend it all for 'the rich'. One dude I follow put it best the wealthy exploit the rich by renting them flashy toys, the rich try to get money from the middle class by selling them things.