off course holding bitcoins is a good thing but not holding every coin becasue that is not good for the price increase for us all if everyone holding the price will only drop.
You are right about that holding up some bitcoins is always good to be honest and right now its very good with this price at the moment.
Nothing can go wrong anymore in my eyes..
Holding is just a save way to earn some money but there must be a moment that you have to sell it and that is the most important moment also.
But it will be hard to know the right moment to sell it because the value is always changing.