I'm thinking about submitting this to their site, but this looks like a potential candidate for a printable gun:
http://heizerfirearms.com/ ...
Kinda cool, but the price... wow. I am going to also have to be able to print money.
something many have not thought about....3d printers......counterfeiting
can't print bitcoins

Why would you need a
3D printer for a flat paper bill?
dollars have a thing called security strip inside
And? Bill counterfeiting is a reality, and they use 2D printers. 3D printed bills with today's technology wouldn't fool anyone, you just can't get that much detail. 3D printing doesn't help with security strips at all.
Hmm. how long have you been trying to counterfeit?