I think it depends on what type of trader you are because if you are a day trader, then it is your duty to spend time on trading and watch the changes of the value of every coin that you are to trade and if the value reached the goal that you want then sell it right away. But if you are a long term holder, then you do not need to consume or spend too much time in trading, what you must do is to just check your coin not too often for the changes in value.
To be successful, you have to spend a lot time on trading. This is the only way to make earnings from the markets. You need to stıdy your lessons well so that you don't make important mistakes.