I just tried day trading in eth and the price fluctuations which happens continuously is something where we can make profit in daily basis, guys from today morning to evening I could have earned nearly 15 to 20$.
True, I am making between 1% to 5% by day trading ETH. When do you know how to trade and learn the market properly, it's actually pretty easy to get profit from ETH trading. But, not everyone can do that because it drains your real life sanity and mental, test your greediness and other stuff. If they fail to do one of them, they will lose their money.
Everyone have a favorite coin/s to trade, that ETH is my second option next to BTC. In fact, I've used them both together if I have more time to spend in trading. It is just quite different when you are in day-trading especially when the market isn't very active. Base on my experience, when it comes to day-trading, BTC is more profitable than ETH. But as you have said, depending on how you work on your trade and that strategies are a big factor that could affect the results either be profiting or not, either be BTC or ETH.