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$. Buying low and selling in a reasonable profit, again when it comes to my price I use to buy and sell for a reasonable margin this will work only if there's continuously fluctuation, just have a try and make daily profit.
For me, holding ETH long term has been more profitable, and also longing or shorting via futures trading too. However, the latter is risky comparatively. I don't think day trading ETH is best decision for me, but good luck if it works for you. I'll still consider day trading it against USDT pair anyway, not really a bad idea.
Holding ETH is far better if you are aiming for much higher profits. Base from how this coin moves from the past
the chance of getting much better benefits are there in the long term holdings.
In regards to future trading, if you fully understand how this types of trading works then the chance of being
profitable is also got a huge potentials and can generate very decent profits.