Well both are profitable but it depends on your capital, if your capital investments is high then you will get more profit in day trading and the best thing about long term investment is if your capital is low still you get some good profit amount.
And it depends also in what coin you're holding if its for long term or just a day trading.
There are coins that are more profitable in long term like just watch the market and let it sleep in your wallet and go back after some years. And some are day trading like you need to closely track and the coin is hype or active in the market.