Alexander Hamilton was never president. Neither was Ben Franklin. Try again
And nor were John Marshall, Salmon P. Chase, Martha Washington or Pocahontas, all of whom have appeared on paper currency.
This matter of who gets featured on currency also recalls this coin:
That would be two more non-Presidents, Stonewall Jackson and Robert E. Lee, on a US (not CSA) coin. The reader will note that the mint date of 1925 puts it squarely in the prime of the Cult of the Lost Cause historical revision movement, that same era that erected countless statues and monuments all over the nation including far-flung areas not related to the Civil War at all, that have been targets of removal from public spaces over the last couple of years.
The coin was in fact designed as a fundraiser for one of those memorials, by Gutzon Borglum, the sculptor who also created the Mount Rushmore edifice. Fun fact: Gutzon Borglum was an anti-immigrant white nationalist, proud member of the Ku Klux Klan and personal close friend of D.C. Stephenson, the Indiana Klan boss who outed scores of state officials for their Klan corruption after his murder conviction. The memorial was supposed to, and eventually did, appear at Stone Mountain Georgia --- where the Klan was re-founded in 1915.