You need to constantly challenge yourself. If you don't want to advance either you need to change your attitude and jump into something that seems hard, or you need to find a new path that you will enjoy.
I don't want to go into management, so I'm trying to figure out how I can be the technical person in the company that is paid more than the CEO. I'll probably never get there, but it is a challenge that keeps me looking to see how I can be better.