How investors find and recognize potential in new cryptocurrencies?

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Backing to the days of Bitcoin, Litecoin, Ethereum, Litecoin, Ripple releases, what was the main trigger for early investors to invest money?
Do we have them in this forum?
If yes, can you share your story?
What information source and knowledge determined you to invest in these cryptocurrencies before they begin to rise?

We all here to chase next big thing or to predict short term trades, so share your story, it will help for community to find real ICO's.