Yeah...I think that they should replace non-presidents before considering a replacement for the presidents. Other than being first...I'm not sure exactly what Hamilton did to earn his hallowed spot on our currency.
Seriously? Hamilton was one of the most prominent founding fathers. He led the Annapolis convention, and by doing so convinced Congress to bring about the Constitutional Convention where our current constitution was written. He then authored more than half of the federalist papers, which remain the number one source for interpreting our constitution. His work as Secretary of the Treasury practically created our entire monetary system and put the country on a solid economic footing.