Space is relative. You only know where something is relative to something else. So if everything is suddenly one thing... there is nowhere it can be, and everywhere
The Big Crunch theory is now invalid, as they discovered the universe is actually speeding up in expansion rate, not slowing down; however, if it were to implode, it would either be sucked into a wormhole into who knows what part of the multiverse, or more likely, return to being a singularity, and start an entirely new universe.
At my house
Gary, Indiana, the armpit of America.