I agree, in fact, professional investor possible to earn money whether the market bull or bear point, in fiat currency trading that we know as forex, we can do 2 way (buy and sell). mostly in exchange specializing cryptocurrency cannot those activities. we only sell just for that moment (release our asset) and buy (we gain asset and hold). so we there are enough differences according to this situation, the hold position is a better decision if the strong down market occurs, we bought more at the lowest point and then wait for it to rise in the bull market. that my opinion anyway.