A flaw with the Pokémon gym collecting pokecoins

I went on vacation with my family to Orlando, Florida and there we traveled to Naples and to Panama. During my stay my family and I went to church and after church was done, I went on Pokémon Go and put my Pokémon in the gym. The thing is that the church is very remote and not many people go there, and if there are people, it is mostly grandmas and grandpas. The point is that since the update, we cant collect pokecoins and have to wait for our Pokémon to be defeated to collect them, but what if no one comes to defeat the Pokémon and it just stays there, what then? And I know that Pokémon Go has added the option of going to the gym to give berries, but mine isnt working, every time I press on it, it tells me that theres a network error...

Haruka I only swim free ? about Pokémon GO, v1.39.0