I find it fascinating how humans have created such a complex system of trade and service based on pieces of paper, and yes I know it's not actually paper, and pieces of metal, all with some writing on it designate something as intangible as worth orvalue. It is amazing how much trust and acceptance you humans put into something so... fragile and ironically insignificant. And then there is these plastic rectangles you call credit cards, which truly intrigues me, because now there isn't even a physical medium with which to represent values! You're trusting... nothing! Nothing, but some numbers stored in some computer in some building somewhere. I could go on, but I'm tired so I think I'm going to call it a night.