Normal to have feeling or thoughts like this?

I'll try and make this short
I feel rather sane, Im generally very empathetic, I try to lead a good life while being kind and compassionate to others.

At the same time deep in the back of my mind, i feel as though life has no purpose and all will one day be forgotten in the folds of time. I'm not even sure on what specific bad and or terrible things id even want to do. I don't really think about this much or get feelings like this often, but it seems as though at the deepest depths of my mind i sense this "option" to snap, like I could just do anything i wanted and while some of it could cause suffering on me or others it would all soon pass in the passage of time and ultimately just not matter as the cosmos move on.

I don't feel like I have many if any desires to do specific bad things to begin with, but idk i kinda wonder if Im tapping into this long in the future self, as if one day ill go crazy. or perhaps its just the classic devil and angle on the shoulder but my devils is suppressed to where its just this vague distant unclear presence.