How do you trade crypto? I'm not well versed in this but find it fascinating. I mean, you can make a good profit of volatility on the way up but how do you prof

How do you trade crypto? I'm not well versed in this but find it fascinating. I mean, you can make a good profit of volatility on the way up but how do you profit when the markets are bearish? You go long/short on currency pairs? I bet there are dozens of different ways of profitably approaching these markets but I have no idea how people actually find a strategy and then decide to quit their jobs and day-trade all day every day without needing institutional money from accredited investors. Do you use machine learning to obtain insights that create those strategies? If anyone knows good books on this subject, please do recommend them!