The problem, as I understand it, is that people have borrowed money on these assumed values. A whole lot of debt that has nothing underneath it.
People have borrowed money on derivatives contracts?
Who would lend based on that?
You have any backup for that claim?
I think the term you are seeking is rehypothecation. A single physical asset hypothetically is the collateral behind one loan, but in practice (re-hypothecation) becomes the collateral for 2 or more loans. Only one of the loans really has valid collateral. If ANY of them fails, the fraudulent practice is exposed. The rest of the loans are unsecured. This practice is apparently very common in the real estate and financial circles. A house of cards waiting to collapse.