The thing is each person has a long time period different from others, lets say for me long time is 6 months above, since crypto does changes very fast, sure bitcoin has rewarded the holders from the last 7 years, who where able to buy and hold had made a nice profit atleast of 5x its investment, but the thing is a lot people from the holders had sold their coins once they hit the roi, the benefict to save for some years might be huge but there is a risk as well.