It depends. Usually day trading is more popular and for me, it takes 1/2 days to compete a trading base on altcoin circumstances. There are many altcoins what newly launched and sometime if you see that your project is getting pump continuously then i don't found any necessary to close your trade? Rather let it expand some more days right? I think this is how things works. But as crypto market is volatile, that's why can't execute trade for long and most of the time day trading perform better
If it is a day-trading, it will not last 2 days, it must be concluded on that day, and that is why they call it such. But at times, it could last more due to the mismanagement of the trader, but in this case, the initial intention was to day trade, but in the end, it lasted beyond it which is understandable,notwithstanding, doesn't warrant day trading to last for 2 days, that was just an excessive trading of it.
Besides, whether it's a day-trading or long-term strategy, all that matters is the knowledge of the trader about it. Some day traders are good at it and so long-term traders are good at it, which is why you have to learn and train regarding what you learn about the two before you know the one that will be better for you as it will always vary among traders due to many factors attached to them and the time and plan of the trader towards trading.
However, if it is about the easier one, I go for the long-term trading, it is so convenient if I must say.