Premise basically, story opens, engineer working on a type of conveyor belt. At leaving work around holidays, boss he hardly knows is giving out random bills to workers such as him he doesn't even know. From here, either the story drifts in vignettes of where this bill goes, or the engineer takes up an active role in tracking this bill via micro-gps-something or other. Invests it into the oldest occupation - a prostitute, although somehow making the action sympathetic to him, and not degenerate. From there it travels the underworld of drugs/organized crime, to laundering in legit businesses, eventually going up the ladder, touching many different moving parts of the world be it, Wall Street, intelligence agencies, NGO's, lobbying, etc, etc, being conglomerated into much much higher sums of money. Finally reaching highest levels of central banking, your BIS, IMF, Davos shit whatever. Maybe a Rothschild figure at the top ordering back down the ladder, to the hardly known boss for a federal reserve branch to print more, at which point we find out this hardly known engineer at the beginning completed the cycle. I'm three deep after work, so excuse the shoddy phone typing. (Edit: doesn't have to be simply about the $100 bill - liquidity can splinter off. Or an example wherever that force of exchange goes, story follows the 'majority shareholder ', or what have you)