I feel good to hold at least 10 to 15 coins at any given time and preferably have your port evenly distributed among them. However, sometimes I will overweight on a couple if I believe/know there is pending news coming or they appear to be an extremely good value. Hard to predict the short term moves but if a coin goes up 50% or more in a day or 2 it's usually good to reposition. However, most of these I'd have no problem holding for the next 1 to 3 years at least. (or until I find something better)