Egregore or More?

I was wondering whether or not you guys think that all gods/demons are egregores or whether or not you guys think there are some that are and not some are not?

From my understanding, most consider these to be conscious entities of their own accord, but I was thinking, if most mythological figures would be built from all the energy of worship and whatnot over the years, how could one say whether or not that these entities existed before our creation of them?

I never really thought about this until today but it’s kind of interesting.
Any opinions?