A lot of traders earn through day trading, so we cant say that it is not profitable. It seems to me that this is one of the easiest strategies.
I don't think it's as easy as you think. Getting money from someone else's bag to your pocket is a problem and it requires a lot of analysis and thinking. Trading in a day often brings a lot of fatigue and you can even be stressed.
Therefore, I do not support trading every day. Please buy low and sell high, but only in potential altcoins. Don't force yourself to work all the time and sometimes the market doesn't look like what you expected.