I would do the same thing because mining is not a joke.  You exert effort and time so you better to keep it and save some of it so of its price goes up then you will have a nice profit just by keeping your bitcoins.  Or maybe if you think that what you have mined is enough and have some spare you might want to sell it and encash it so you could savor the fruit of your labor.  Just a treat to have some inspiration to have more.