Yes it is true that Bitcoin is very profitable while being risky. If we want to beat this risk, we must hold it for a long time.
It is not a must to hold a long time. If you don't brave for holding a long term, you can hold it for a short term. It purely depends on your goal. If you don't set a too high profits, you can set for a short term holding. Not every holder hold for a long term, some only hold for a short term. By the way, having good knowledge is the way to deal with the risks.
~ there is a risk in every person who wants to make something that makes a big profit and cannot be separated from the word risk.
TBH, I'm not really sure your point, dude.
However, the risk isn't on the person but it lies on the investment.
Expecting for big profits is normal, nothing wrong with this matter. It is only considered a wrong perception if someone expects big profits but he does it in an improper (careless) way. Investing with lack of knowledge is an example of an improper way. There is no way to succeed if we invest with lack of knowledge.