I dont agree that these are the most important word in in cryptocurrency. Fistly, luck, in my opinion, is not only connected to " buy low" and "sell high" slogan as many guys see it.
In cryptocurrency, many guys has invested directly on notable projects and come cryptos millionaire and were not topically based on "buy low and sell high" luck. I think there are things to learn as a crypto trader rather than buying low and selling high that is relaying on luck. You can actually succeed as a crypto enthusiasts or trader, without luck.