The hypothesis that the Big Bang was caused by a black hole from another universe is an intriguing idea, but it is currently speculative and not supported by scientific evidence.
The Big Bang theory describes the rapid expansion of the universe from a highly dense and hot state. It is widely accepted within the scientific community and is supported by various lines of observational evidence, such as the cosmic microwave background radiation and the observed redshift of distant galaxies.
While the specific cause of the Big Bang remains an area of active research, it is not currently known whether it emerged from a black hole in another universe or if it originated from a different mechanism altogether. The nature of the universe before the Big Bang and the processes that triggered its expansion are still subjects of intense study and speculation in theoretical physics and cosmology.
It's important to recognize that our current understanding of physics breaks down at the extreme conditions near the singularity of a black hole or at the very early moments of the universe. As a result, exploring the origins of the universe and the potential connections between black holes and the Big Bang remains an active area of scientific inquiry, with much still to be discovered and understood.