I have the same theory about white holes being big bangs but black holes are constantly taking in matter. Do small black holes produce the same level of parallel universe? Do super massive black holes produce bigger universes? Does it matter since the universe they spawn would also grow infinitely? Since the universe will experience heat death, does that mean each subsequent universe will have less and less matter until there’s a final black hole that forms?

I read an article about how there’s theoretically black holes older than the universe, which spawns even more fun questions.