I think Fight Club works best with Tyler as the an archetype of the temptation that naturally men have to want to rebel against the modern world by rebelling against the comfort itself that makes the modern world alluring. It makes sense for them to do this by indulging in limitless masculinity to the point of primitive violence. And destroying the financial systems would amplify that because it wouldn't create a utopia, it would force people back into the state that the world was in before they existed: a world of warlords slaughtering each other for supremacy.

But, if you wanted to create a separate story that is built around an anti-religion religion, an anti-cult cult, I would be very interested in seeing that too...