They are both profitable, but I think it's better to do a day trade in ETH. I say this based on my experience in the trading activity I do, so that I can move faster with ETH compared to Bitcoin.

Then I get more profit in ETH compared to Bitcoin. Although I'm not saying that Bitcoin is ugly, of course that's not my point. I just don't know about others, because others find them more beautiful in Bitcoin. Maybe it depends just on the knowledge you have about crypto trading; it's just that likely.