Where's this trader going to put his money so it's "safe", when it all goes tits up? Banks will only guarantee a certain amount - gold and buried cans of baked beans perhaps?
Do Goldman Sachs really rule the world? What if all of the world's governments just said "fug it!", and defaulted en masse - wouldn't the financial charlatans i.e. those like Goldmans just collapse anyway? How can Sachs be considered to "rule the world", since it was bailed out anyway after Lehman?
They don't "create" wealth anyway - they just redistribute what is there anyway, to their own advantage. Confidence and fear are their "assets", the ones where they "make" the big money, fast.