there is nothing wrong for those who have a long enough time to become a profitable day trader.
There are different approaches are available for day trading; you do not need to be spending long hours for all types of day trading but only for scalping kind of continuous trading, you may need to spend long hours for trading.
If you're good at technical analysis and when you have accurate entry and exit levels then you just need to trade only for few minutes. Because, with limit-stop-loss orders you can place orders in advance and the rest will be happening when market meets your entry and exit levels. Still, time to time monitoring is recommended but there will be definitely no need of continuous monitoring.
I'd find no accurate and perfect timing in the crypto world but at least we are near to the possible outcomes.
And we don't need to have these all strategies to get succeed because the most important is how good we are in analyzing the market situation. This is a big challenge for the beginners, they'll find it hard to understand and that is why we often seeing them losing. And we don't have any escaped from this even though we already have the advantage as this is the normal possible scenario to happen in trading.
I have always followed and looked for many commercial strategies, especially my favorite theory, which is the teachings of Wyckoff's philosophy, and in Wyckoff's academy the teachers only do "Scalping" to feel the adrenaline and show that they are not wrong in their analysis. . To do short-term trading or "scalping" at least for me means knowing too much to reach that level, it is knowing the market before any eventuality.
I do not do "scalping" because I would be gambling and it is not the idea, because if I enter to operate I must have my security almost 100% to take that risk.
That is why I do not see that it is so advisable to operate in so few minutes because it is more likely to lose than to win, in addition to trading scalping mode and having a good profit, you have to put a lot of money for have a big profit.