I'm glad you asked who knows the most or is wisest --
because so much of success or failure is based on other factors like starting capital or luck that some of the richest people today wouldn't be smart enough to make it back to the top if they had to start over in an industry choked with Visa regs, anti-spam laws, competition, etc.
Maybe that's a way to ask it...
Of all the success stories, who do you think would be most able to reproduce their success if they were just getting started today with their brain and .... $5K ??
