Day trading can be more profitable in the situation of market like now, but to get profit we should be focus on that and spend alot of times for that. Only trader with good strategy, has good management of risk and money and possible to manage the emotions can make consistent profit from it.
It is necessary to keep in touch with the market and know about market values and fluctuations in order to take benefit from the coins you have and to sell that on the price little higher that the price on which coins have bought. You have to aware yourself in day time which is important to keep in touch with the market.
I think that day trading is not as profitable as trading short and midterm.
If the assumptions on that you have based your trade are right, why stop in a day?
Move Stop-Loss up to secure profit and maybe sell half or so but then just let it run.
Trailing Stop-Loss is also a nice tool for that, but not many exchanges offer it.
In the time you are letting your trade go on, you are making more money with less risk than starting a new trade.