Big Bang & the Black Holes

We have often wondered that how the universe started and came into existence. What was before it and what will be left after the universe dies (if it does)

So, Recently I came up with an idea that what happens to all the matter & energy that goes into the black holes. Do they remain there forever or do they come out when the black hole explodes. So,  here is what I came up with:

As a black hole gets smaller and smaller, it emits more and more radiation. In the last moments of its life, the black hole emits so much radiation, so quickly that it effectively acts like a bomb, releasing a torrent of high-energy radiation and particles. #1

It is worth to be noted that "Astronomers have not seen any black holes explode so far, but they are still on the lookout"

So, what if the explosion of blackhole is nothing but a new "BIG-BANG", the start of a new universe, a new life. What if our universe was nothing but a blackhole in a larger universe of which we are a part of but are unaware of it. It is not a parallel universe but a larger set of which our universe is a sub-set. Unfortunately we may not be able to find the answers to such questions, but can only speculate. 

"Keep thinking & keep smiling because it won't cost you anything 😊

#1: https://www.livescience.com/can-a-black-hole-explode#:~:text=As%20a%20black%20hole%20gets,high%2Denergy%20radiation%20and%20particles.