The nature of dark matter and its behavior before the Big Bang is not currently well understood. Dark matter is a hypothetical form of matter that does not interact with light or other forms of electromagnetic radiation, making it challenging to observe directly. Its existence is inferred from its gravitational effects on visible matter and the structure of the universe.
The Big Bang theory describes the beginning of our observable universe as a rapid expansion from a highly dense and hot state. However, the exact conditions and behavior of matter, including dark matter, before the Big Bang are not currently known or well-constrained by scientific understanding.
It's worth noting that the concept of time itself may break down at the moment of the Big Bang, making it difficult to apply our understanding of cause and effect to events before that point. The laws of physics, as we currently understand them, may not be applicable or may undergo significant changes under those extreme conditions.
Therefore, while there are various speculative theories and ideas about the origin and behavior of dark matter, there is currently no consensus on whether dark matter existed before the Big Bang or where any hypothetical displaced matter might have gone. These are active areas of research and subject to ongoing scientific investigation and theoretical exploration.