I suggest day trade. Trading is not an easy work but is surely profitable in the long run. Yes its true that both is profitable but the question is how much time you intend to invest. If you have plenty of time go trading though it not always you gain something but make it sure that you learn something. Another good thing about being a trader is that the skill you get from trading cryptos is also applicable to stocks and forex.
Yeah, both highly profitable, but in my opinion, holding it more profitable, while the day trade is easy to panic because when prices rise several percents they directly sell it. but it all depends on the style of the game, but I myself prefer holding because I was not able to be constantly in front of the computer all day.