There are generally two approaches towards trading. The one who fundamentally analyze the market and coins, they'd would buy and hold a promising coins. But for the one who do technical analysis, they profit from market movement, they trade in a small interval of time and it doesn't matter which coin they trade or whether it is a good coin or not.
Yes, that is very true and I personally also often use technical analysis to gain profit through market movements at this time, but I also often choose good tokens or coins in terms of trading even though I do it in a very short duration.