U.S. Billionaires Are Collectively Worth About $5.7 Trillion. Here's How They Made Their Fortunes — And Surprisingly Most Are Not in Tech. From banking to real estate, U.S. billionaires amassed their wealth in different ways. Previous Article American Parents Are Loaning Their Kids Money — Sometimes With Serious Strings Attached: 'Even Generosity Comes With Boundaries' Next Article Crispy Chicken Salad (With Maple Mustard Dressing)
