I have a question about infinity

If infinity is real, it means that everything is possible. So the fantasies of Of a version of me being the grouchy merchant with a huge harem of elves, demons and all kinds of monster girls of dubious age, is Real somewhere in the universe?

The infinite universe is mostly just empty void and matter is concentrated around us.

I might be bullshitting you but I remember reading this theory somewhere.

but it must not necessarily be this universe

It could be in another, if there is one there are others, it is impossible that there is only one space-time

It's actually completely possible, we just don't know.

no & ensemble average is a mathematical construct, no physicist takes the concept literally