Depends on a coin. If you are sure about your alts and they have a great technology, hodl. Alts crashed today and can crash even harder but I'm not gonna sell anything. I believe in the projects I put my money in.
I agree, it depends on the value of your Altcoins but for me whether it has higher value or not they still have a chance to increase it pump.
If you're going to convert all of your Altcoins into Bitcoin then you might get handful of profits.