Well it depends on your plan. For example someone who plans on going to college abroad but doesn't want to go through highschool can drop out now and get a GED. A GED is basically a highschool diploma without having to go through all of highschool. Or maybe you have some talent like dancing or musical skills or maybe even gaming talent. If you're in one of the situations above it's not such a bad idea to quit but still wouldn't be recommended. If you're just quitting because you don't feel like it or if you don't have a plan that's a pretty easy way to ruin your life.