With crypto, it does not need much skills and experience. You can easily make 5-10% in a day if you pick the right coins.
Well, even if you pick the right coins, doing things wrong will always affect you at the end of the day. It is not about picking the right coin; it is by knowing what to do exactly, considering the nature of the market and if you cannot do it right, you will always end up losing eventually. Trading needs huge level of knowledge, either day trading, short term or long term, and as long as that is not there, such a person will only end up more like a gambler.
I believe day trading needs both luck as well skills to make good earning.
I guess that you have confirmed day trading is nothing but gambling. When you are considering luck is the deciding factor then I am sure you are considering day trading as a modified version of gambling.
Skills make the user predict the market variations, but luck decides how much to be earned.
Due to high volatile nature of market within a day, most traders do fail to predict the end points of trends. That is the reason they do wait more or they do book profits so earlier. In both the case, I must agree our luck is the deciding factor which may be playing similar role of what it will do while we are gambling.