You get around 900~1200 sun coins for each sage. But for the sake of quick math. Let's assume you get 1k for each sage world and matsuri. That's alone would be 5k/week (3 sage 2 matsuri). Then you just need 2 RJ to reach the cap.

So my asnwer will be yes people who already stand at the top of the food chain in their bracket. But not worth it for people who just start to freeze.