After people do a thing for a long enough time, they start to wonder "what's next?"

Recreational runners eventually sign up for a 5k. Then they do a few of those and that turns into a half marathon, which then may lead into a full marathon. 

With CrossFit, typically the "Next Thing" is to do a competition. Whether it be a scaled comp, partner comp, or individual of some sort.

However, is that the only option of what's next? 

Nope, there are plenty of other things you can do to test or improve your fitness further, or even to just reinvigorate your drive for fitness.