At those scales, everything is zero. But the important thing is the potential to see an object. If the Rosetta Stone is sold to an anonymous private collector,

At those scales, everything is zero. But the important thing is the potential to see an object. If the Rosetta Stone is sold to an anonymous private collector, I have practically zero chance of ever seeing it, no matter who I am, what I earn, or where I live. But if it's in a public museum, then my access is much greater.