Usually the major existential issue for me is just dreaming itself and thought-forms I interact both inside and out. With how that despite of there not really being a dualism or dichotomy between the unconscious and conscious mind, that there can be a sense of rapport with thought-forms in dreams that makes one question into thinking how much it's easy to revel and be lost within their own mind.
Just like any dreamer that encounters sentient and sapient dream characters beyond their imagination, and how people may pour out all their desires into these dream characters (and then label them as dream guides, astral guides, spirit guides, and what have you), that there seems to be some kind of contradicting logic on how people label others as more crazy than the other. Although this is now shifted into a social matter, it makes me wonder if these people's linear ways of thinking makes any sense (when they disregard some application or labeling with certain thought-forms, even when their beliefs in a supernatural entity beyond the confines of their mind is even more concerning).
Mostly with how if one were to lend faith into themselves, as in the type of faith of accepting the resourcefulness and implicit knowledge with the unconscious mind, that in order for them to conceptualize it, an entity that would be seen as a "higher aspect of self" is created. Whether it's an unconscious protocol as them being a conduit in sublimating unconscious thoughts and giving insight to the dreamer or something beyond my own level of thinking never ceases to amaze me.
Especially when the model Four Stages of Competence and other measurements of human capability becomes a laughing stock to me when engaging in personal endeavors of human exploration with dreaming and such. Of course, despite of this being a major existential concern, it's really more of an inspiration to just explore it knowing there's more than I think I can find.
Considering how we can still sustain a sense of self-identity after encountering with so many figments of our imagination in our natural sleep.