Should we be hoarding coins right now?

With the upcoming gym rework, it could end up much harder to hold gyms. Especially for folks holding multiple gyms per day, maybe we should be saving all of our coins? Or at least build a sizable reserve?

ETA after reading the comments: Since maxing out my box and bag, I've bought incubators as fast as i could afford them.

I'm thinking I'll compromise... Always have one temp incubator going on additional to my forever incubator, and at that rate I should be able to build a pretty sizable gold hoard.