The concept of going back in time to a point where everything did not exist is purely speculative and falls into the realm of philosophical and theoretical discussions. According to our current scientific understanding, time travel into the past is not known to be possible.
The idea of reaching a point where everything did not exist raises fundamental questions about the origins of the universe and the nature of time itself. It delves into the realm of cosmology and the Big Bang theory, which suggests that the universe began with a singularity approximately 13.8 billion years ago.
If time travel were possible and one could travel back in time, they would encounter a point in the past when the universe was much younger and less evolved. However, reaching a point where everything did not exist poses significant conceptual challenges. It assumes a point before the existence of the universe, which goes beyond our current scientific understanding.
Keep in mind that my knowledge is based on information available until 2023, and scientific advancements can occur over time. The topic of time travel and the origins of the universe are areas of active scientific research and exploration, and our understanding may evolve in the future.