Well, recent research shows that something like 80% of all notes have traces of
cocaine on them, probably due to their dual use as firstly a
funnel and then a
straw in this highly expensive
sport. Maybe that is what gives money its '
je ne sais quoi'.
If so, i strongly advise no longer sniffing money due to the possible bad side effects that it may entail, including an addiction to money. (see hyper capitalism)
P.S. Its not just American money that has the distinctive smell, Every currency that I have come across has it.