@Andy - you need to add something where to spend game cash. without brutal wars money just keep growing. Weapons are also useless as you don't lose them during everlasting peace.
@John - that is an insane amount having in mind that during the last year in FB I have only seen 1 new president waging and wining 1 single pvp war against inactive president. I prefer money, as with large empire you can buy weapons very fast, and also it is not clear what kind of weapons will be needed in the future. Maybe only thing worth doing is hording millions of conventional batts with ammo as you can shoot them at anybody at any time.