They say that day trading is a skill, so practicing should make you good at it right? How long someone from newbie to advanced should spend to be considered good?
In my opinion it is really long process, but even in case of big experience we should consider great role of luck and intuition in this duty...so it is nearly impossible to say about amounts of time which need to be spent trading.
You might need a lot of time in the beginning if you are new in trading. You need time to learn the skills, charts and information about the coins. You need to learn about techniques, stop losses and other analytical skills. Once you have enough experience in trading, then it will not take much of you time and you will just place good orders. However, if trading is your full time work and you are involved in day trading, then you will have to spent many hours in trading to get as better profit as possible.