For me, it depends on what kind of altcoins that I am holding.
I am holding more than couple of dozens of altcoins but not all of them that I am going to sell because some of my altcoins will do have the potential to pump and increase it's price value in the nearest future.
Just like my Oyster Pearl PRL, I choose to hold it because it has been predicted that it will do have a price value of around $10 in the next few months.