Agreed and +1 to this. I don't see any luck in here to earn or to get profit. If you really want to enter in here, you should have the knowledge how the market goes and really need to research about the coin you want. If you they really want to invest they need a lot of discipline, self-control, and patience. Bitcoin is not for soft people, bitcoin is for the people who face risk no matter what.
Luck is more correctly to use for traders and gamblers who don't do research, learn about Bitcoin's fundamentals, basics about trading and investment, but want to join and want to get rich quickly.
Hence they bet and hope they will luckily win, get profit with their trading or investment, or even with leverages.
However, it is oppositely with investors who already did due diligent research about Bitcoin and understand about this market as well as carefully manage their capital, risk and don't leverage their position. If they get profit from investment carefully like this, I don't see they luckily get profit but they actually well-deserved with any profit they achieve.