In the stock market, a company's value is determined by a kind of group consensus. The so-called experts analyze the company's track record and try to project it's future possibilities for success. They decide whether or not they want to buy or sell the stock and if enough of them start buying the same company at the same time, the company's stock rockets in value.
Sometimes, a stock nearly everyone viewed as a sure thing ends up being a bust, losing value overnight. Other times, an overlooked little gem can come out of nowhere to capture major market shares and explode in value. Anybody who knew enough to buy early is left looking smart.
Projecting fighter success and glory is not entirely different. Boxing fans love to be early adopters for rising stars, or else, the wise guys who knew to sell off in advance of an overhyped contender's inevitable crash.