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.
Seems like you took advantage of the price fluctuation. Well I am glad for your earnings there,mate.
It is like simply just a buy at low and sell at high mindset, and I am still scratching my head sometimes on why this concept is confusing to some people still.