remain the same: buy down sell up
The problem with "buy low sell high" is that after you sell high, Bitcoin often keeps going up and up and up, while you're stuck in fiat. And sometimes after you buy low, it keeps crashing.
well to be honest that happens for me too, but if price falls down then you just have to wait when price will go up again,and price will go up again for sure
there are no problems with buy when cheap and sell when expensive because this way will give you plenty of profit