If I had a stack of $100 bills, and I told you that for every bill you eat I will give you one to keep, how much money do you think you'd walk away with?
All in one sitting. You get one condiment of choice, and a large glass of water. Bills can be torn up before consumption but nothing is stopping you from housing full Benjamins and digging for gold in the bathroom later. I think I could probably eat at least 10, and I would pick BBQ sauce.
If strictly USD 100 bills: not worth it since destruction of legal tender is illegal and I won't risk you ratting me out. But if I get to choose a currency where it's legal (such as Euros) and which don't contain much plastic... probably as much as can fit in my stomach which is probably a few hundred bills.
I mean why not? A typical bank note weighs about 1g and probably has a similar density to most starchy food. With enough condiment and water, eating half a kilo of the stuff isn't something I'd enjoy on a daily basis but totally worth it if I get paid the equivalent of half a year's salary.
I honestly thought you meant a few bills, each worth a hundred, and I was trying to make a joke.
Starchy food is mostly water - around 75% for potatoes. So 500g of zero-moisture would require 1.5L of water to break even not with 500g of potatoes, but with 2kg potatoes, or 80-85% of a 5-pound sack of potatoes for our US readers.
Bottom line, 500g equivalency to starchy food would be to eat 2kg of potatoes with no additional water. Ambitious!
That's for raw potatos and you assume fully water-free bank notes. While I couldn't find how much water a cotton-fiber blend would draw from the surrounding air, I found the water content of potato chips to be around 3%. Eating the equivalent of 4-5 regular sized bags of chips with barbeque sauce sounds absolutely doable. Not pleasant, not healthy but definitely something I'd attempt for 50000 bucks.
You're right that I'm assuming bank note moisture is negligible or sealed, which may or may not be the case in practice. However, raw potatoes are 79% water and baked potatoes are 75% water (re-reading, I see that I didn't actually say baked, my error).
The source I linked has a similar water content for potato chips, no dispute there. We could say that stack of 500 Benjies would be like eating 2 full bags of potato chips (an amount that would be 2,500+ calories of chips, for scale) with zero water, if you'd prefer to imagine how your digestive system would fare with that instead? Whether fried or baked, all I'm saying is it would be ambitious. :)
If you managed to eat several hundred bills I wouldn't dream of snitching on you out of respect and sheer awe. I'd probably give you a few extra just for the show