Hindsight is a beautiful thing, and most of the time, the genius behind some of humanity's greatest innovations is only apparent looking backward. Nobody knew we needed computers until we had them, and the concept of a smartphone sounded ludicrous until... well... it wasn't.

The same goes for investing. It's impossible to know ahead of time that a financial asset will increase in value by a life-changing amount -- whether it's a stock or a cryptocurrency. But it does happen, and the markets are filled with great examples. 

I'm going to share three of them. Each one would have generated a gain of more than $10 million from a well-timed initial investment of $10,000, assuming the investor was still holding on today. Let's explore the details. 

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Source Fool.com