To me, I feel not everyone can handle the volatility of the market and still remain emotional stable to see how the money fluctuates up and down, without knowing what next would happen to their Bitcoin investment.
Many people are fearful of Bitcoin investment despite the fact the knows how the market works, but having them stick around without reacting to price declines of Bitcoin is what feels very hard for them to do, so that they will save themselves from the emotional stress Bitcoin would cause to them.
Understanding how Bitcoin works is one thing, but having discipline to hold through the ups and downs of the market is something entirely different, so many people panic and get when they see their investment drop down percentage even when they know the market could be good and recover later and thats why bitcoin is not only about knowledge it also requires patience and not everyone has patience.