You know, I faced something similar when I felt I have finally found "success". It was a difficult time to get motivated not only because of the lack of any more challenges, but also because I felt I had lost a worthwhile goal to pursue.

In any case, it seems that you're financially successful, love what you do, and right now may be looking for the new challenge.

I would definitely recommend you take some time to think about what are new challenges you'd like to tackle. Brainstorm and don't let reason hold you back from making big and daring goals. Then review your resources and see what you need to work on to start on another path.

Hope this helps. Obviously a lot of other great recommendations in this thread, so I definitely recommend you start writing down your thoughts and how you're thinking through things. It'll help you keep track of your progress.