Why This Stuff Costs $2700 Trillion Per Gram - Antimatter at CERN

The universe is pretty big. Could it be that matter tends to clump together and anti matter tends to clump together with areas in the universe with both could have annihilated each other leaving empty space. So there could be an abundance of antimatter somewhere. It's just REALLY far away, like the edge of our matter universe far. Also would we be able to see anti matter? How does light that reacts with matter the way we see it react with anti matter? So many questions and I'm rambling now....