What existential question fucks you up the most?

Obligatory I'm late to this. The fact that I will experience the future or rather someone else will. It always bugged me I'll never see the distant universe in my lifetime. In response to this I thought about somebody else in the future. After I die and my conscious dissolves into whatever it may be, somewhere along the line that is time, another conscious will form and experience that future time. I will not exist but they will. Just as somebody who lived before me no longer exists or experiences this current time, somebody in the future will experience that future time. Somebody in the future will form a conscious as I have in my time and experience that future time. It even hurts my head to think about.

Tl;dr Time is linear and a new conscious will form that experiences a later time that I won't. Therefore it is a way to experience the future even though my conscious won't experience it and the new conscious won't have any recollection of the past conscious yet there is a conscious in the future time and therefore getting to experience it

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