Hodling is cool to avoid panic selling of your potential altcoins. Just make sure you don't sell at a lose because it happens and the market would recover back in the nearest future.
I've learned that mistake a long time ago -_-. Sold LTC @$90 only to watch it climb to $200 before buying in again. I made 4x profit, but got scared it was going to crash to $0 because of how volatile the market was.