I have come to realize that not everyone that invested in Bitcoin will achieve the same results or succeed with it. It's not even about how intelligent or knowledgeable you are, or how much you used to invest in Bitcoin. I think it depends on mindset, discipline, and the ability to stick to a well defined plan despite market volatility. Successful investors are those ones that make up their mind that no matter what, they won't touch their Bitcoin because their full focus is on the long term gains unlike people who are driven by their own emotions during price fluctuations.
I will like to point out something. When you speak of success through Bitcoin, we should not forget that to be successful in Bitcoin is not by hodlings without selling. You have to take profits at some point.
I do think we over do the idea of holding and thus many new investors get confused about it because they feel like when they take profits they become a bad investor.
If you have a well defined plan, you have to follow it. It's as simple as telling yourself that once you attain a certain amount of profits from your initial capital, you will not hesitate to sell high and wait to buy low.