If you're going to put a specific value on something, it's be much more accurate to calculate it as the sum of the entire demand for that something divided by its quantity.

To take the 100 shares at $500 example from @stanmancan, if one person is willing to pay $500, another 10 is willing to pay $400 for one share each, and one more person is willing to pay $300 for 20 shares, and one large investor is willing to buy up the rest for $100 only, the total demand for the whole company is $14,400 for 100 shares or $144/share. That's the true value.

I can guarantee you that there isn't even an order of magnitude close to $8B of demand for the artificially created and restricted BCH, so that value wasn't really created.