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.
You don't earn faster, you simply have a higher frequency of trades. Day trading actually looks to just use what hopefully is a positive strategy with a slight edge, but to use frequency to turn that small edge into significant +EV. so a tiny 0.1% profit done 100 times becomes 10%. Like you said, though, as the majority of traders lose money, you'll actually only accelerate your losses with daily trading.
And actually this condition? It's good for day trading. You want volatility and the ability to take advantage of panic to keep short selling.
It's purely for automated trading strats now. If you're still manually day trading, you're wasting your time IMO.