The largest number I'd heard so far was around $100-110 Trillion, much of it Credit Default Swaps.
When a swap derivative based on Lehman Bros. crossed the market at 20 cents on the dollar, is when AIG trading stopped and every major money-center and investment bank in the world went broke. Thereafter, they were fiercely pumped up with fiat money and declared solvent by, again, fiat.
That's my understanding of it, anyway. But what do I know?
I agree - you have a humble and gracious attitude towards it. No one really knows except God.
Reading the Book of Revelation, however, clues me in that the world will be enslaved economically, religiously, and politically. When will that occur exactly? I don't know.