Of course 99% is chance and 1% should be solid research but what is way more important is the starting capital.
So if you invest 10k you only need 100x times which is of course more likely than 1k ( since you need 1000x ) .. but if cryptocurrency become mass adopted i think any investment could become easily 1 mill.
The only thing to concern here is that if cryptocurrency gets mass adoption you probably don't want a million anymore, just don't invest in total shitcoins