This is the danger of someone getting really lucky early in their investment lifetime, they assume it's due to all of the analysis and reasoning they did, and not just luck. The number of people smarter than you OP who have lost everything in speculations and complicated investments is massive, and I'm sure they had all sorts of complex analysis backing them. The number of people who've lost everything by investing long term in the entire stock market is non existent.
If we went into a black box where we never saw actual results, you could get a skilled debater to argue why any single investment in the world would be amazing. Rationalizing why something is great isn't hard, high paid analysts do it every day. It's actually predicting the things accurately long term that's tricky. I can go to Vegas tomorrow and put everything on red, just because it lands on red doesn't make me an expert, regardless of how I explain my overly complicated method based on the tilt of the table and the size of that particular ball versus the hand of the person who drops it.
Of course I'm sure you'll dismiss me as a hater, the same as many gamblers on a win streak, or people whose favorite penny stock went up 500% in the last three months would. I hope things work out for you, and it's possible you'll make a fortune with this approach, just be aware that it's also possible you'll lose everything.
Remember it's not just the product or the tech you have to evaluate, it's public sentiment, and public sentiment is a very volatile thing. One big news story or world event could completely turn the tides of any particular cryptocurrency.
edit:
And as for stocks being at the top, here's an interesting thread about why it is at a top, started in April:
https://forum.mrmoneymustache.com/investor-alley/top-is-in/150/And here's one from 2014:
https://forum.mrmoneymustache.com/investor-alley/a-crash-is-coming/I'm sure if you look back through the archives you can find them as far back as this forum goes. News articles by highly paid analysts with all sorts of metrics backing them up from every year are just a google search away.
Will there be a crash, correction, or period of lagging returns? Definitely. The question is, will you be better off waiting for that to happen? It's not something anyone can predict, but the odds favor getting in as early as possible.