What's the point of existence?
You only exist for this one moment. The past and future don't exist for you. Your body and brain will exist at other times (slightly altered), but those are different instances of consciousness, not you. All “you” are is the specific sense of self that you are feeling at this moment.
It will be an eternally true fact of the universe that you exist at this place and this time. So reflect on and appreciate your peaceful eternal now.