“It might take you by surprise to hear that market capitalization peaked for Bill Gates, Steve Jobs, Jeff Bezos, and their likes, when these founders were middle-aged. For instance, Apple’s most profitable innovation, the iPhone, was first launched when Steve Jobs was 52 years of age. Likewise, Amazon’s future market cap growth rate was highest when Bezos turned 45 and Amazon had moved far beyond selling books online.”
via The Average Age Of A Successful Startup Founder Is 45