Idea for future maybe?

How about this for an idea

Keep the same coin reward for holding gyms at 50 coins a day.

then add a reward for the hardcore players and people that want to have fun battling their own mons for practice, or taking down gyms enjoying a challenge.

here's my idea,
reward 1 extra pokecoin if:
a single mon is able to defeat a defending mon with twice as much CP raising the total coins a trainer can earn per day to 100