you must not have enough knowledge before starting trading. I have seen many people becoming rich thanks to trading. You need to spend more time to learn about trading before getting use to it. well, holding your coins is not a bad idea, but you will lose a chance to earn even more money 
Hehe, honestly day trading always better than holding in long term about profit and base price, however your health will decrease after long time working with day trading (because your emotion easy affect if the price of altcoin you trading not happening like your predict) 