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.
To be honest, I have been doing that this recent year. Put 5 minutes chart and put some indicators to help me analyze the chart, I got so much losses at the beginning when I tried it out the first time due to how volatile the price is, but once you know how to read the chart and predict the event later, we can get money from that.
For sure, you need sufficient capital in order to get decent profit tho :p