Billionaire investor Mark Cuban vividly remembers the moment he finally felt successful — because he spent so many years beforehand trying to stave off being flat broke. The turning point "was probably when I had $100,000 in the bank," Cuban, now 65, said. And telling my dad who just broke down in tears and started sobbing." The effort paid off when Cuban sold MicroSolutions for $6 million in 1990 to CompuServe, a now-defunct internet services company. "There's a huge difference between being a millionaire and a billionaire," Cuban told GQ.

---

Persons: Mark Cuban, GQ —, he'd, Dave Winslow, we're, It's, Charles Schwab's, Cuban, Barstool, Broadcast.com Organizations: Cuban, GQ, Wealth Survey, Cisco, CompuServe, Yahoo, CNBC Locations: Cuban