Whenever I heard these kinds of stories, I remind myself that loss aversion is a cognitive bias that we all share.
Sure, maybe some people passed on an opportunity to invest in 1994, but the general public had the opportunity to invest in Amazon any time after Amazon's IPO in May 1997. Someone who invested $50k then would be holding shares worth $95 million today. It's not quite billionaire territory, but it's still a very successful investment by anyone's standard.