Completely depend on the coin we choose because some coin will show their potential in a short period of time, but we need to have patience in this altcoin market. If you cannot sell them for higher prices suddenly the prices of the coin will drop that's why we need to be very active in the market.
It's very important to be active in the market every day because prices will continue to experience changes that you would not expect. Every second will get a new price that you might not be able to guess correctly.
By the way, there are a lot of apps that can show us price of altcoins. Maybe not all but, it can be alarm when price that we expected reached. So we wouldn't miss any pump or dump if reach price that we are set. Maybe it can really help for people who can't really always online to see market.