Yea the volatility of the altcoin maybe is the key factor for trading but there are still 3 important questions we can ask for the trade.
1- Which altcoins do you prefer for your daily or short time trade generally?
2- And why do you prefer?
3- Do you have any daily income goal or you trade as much as you can with this altcoins?
many alcoin I purchase an important point I bought altcoin it at a cheap price lau I save it for some time until there is a significant price increase recently I would resell as well as altcoin the other so it is not every day I can be advantages, at least a week more can only be