I'm intrigued by this idea. It has a dash of gravitas, doesn't it? That what we experience around us might not be real. That's an old, old idea. It's at the heart of mysticism and many religions and philosophies.
It is theorized that everything that enters a black hole
is sort of recorded by the event horizon, stretched out into two
dimensional echoes of worlds, stars, and galaxies. Our universe has
holographic properties, so many so that Fermilabs has built a Holometer
to test for a specific holographic property. This could be evidence of
many things: simulations, recordings, even simply the reality happens to
be holographic. What if it is a holographic recording/ echo of our
universe? The real universe that once existed before it was swallowed
up into the black hole. We are simply echoes of things, the memories of
quantum interactions entangled before our doom. Perhaps, the Big Bang
is the the history leading up to our universe's all-consuming black
hole, but in reverse time. Or not. Probably, according the the
Simulation Hypothesis, we're just someone's simulation or recording, but
that just not a sexy as us being ghosts on the event horizon of the
black hole that ate our universe.