I am also holding all my coins, I have not sold a single coin because I am here for the long run. The made the best profits with just holding my coins... I think it is one of the best strategys to stay alive in these days.
I confirm that there are a few pennies if the longer they hold, the higher the profit for us. But there are also pennies that hold the longer they lose value. So try to analyze the trend of the coin you hold to make the right plan for yourself.