" Amazon is up a whopping 38,600% since its 1997 IPO, compounding at 35.5% annually. This would have grown a $1,000 investment into $387,000 today. But the degree of difficulty of actually turning that $1,000 into $387,000 20 years later cannot be overstated. See, Amazon got cut in half three separate times. On one of those occasions, from December 1999 through October 2001, it lost 95% of its value! Over that time, the hypothetical $1,000 investment would have shrunk from a high of $54,433 down to $3,045, a $51,388 loss. So you see why looking at a long‐term winner and wishing you had bought in is a fool's errand. “Man I should have known Amazon was going to change the world.” Fine, perhaps you should have. But even if you had that information, it would not have made it any easier to hang on for the ride. "

― Michael Batnick , Big Mistakes: The Best Investors and Their Worst Investments