Day trading is actually risky because it is hard to manage your trades, watching the charts all day, and preventing yourself to have losses, that is why there are only few people who does day trading. But the advantages of day trading is that you can earn much faster than long term trading.
The advantage is you can earn faster but the disadvantage is you can have a losses for a week or month because day trading is very hard. even you have that knowledge in crypto it is not enough. especially this days that the market is not good enough to take day trading. I wouldn't recommend it if my friend want to try day trading.