Stipple and Pointillism are essentially the same thing. It is a technique used in art with lots of dots.
Medium: Black pen
A pointillist drawing of a portrait or an image on paper currency (From any country). The drawing should be larger than it is in real life. For example: the portrait should be monumentalized compared to the scale on the bill. Use more points in the corners to create a vignetting effect that will draw the eyes in toward the center.
Listen to this NPR clip and view the stipple work of Noli Novak
This example is with an old US $5 bill. You can focus on any currency and do a detail of the most interesting part of the money.
