As would a few others, I've had one ask what I'd want for a GIN and the sad thing is I just don't know enough about older paper currency to calculate a proper GIN.
If I were you I would let it run its course just like the ten dollars bill although I don't know if that one is truly a gold certificate or not but it's still very nice and collectable.
absolutely Beautiful. Piece ! Very Nice, Wish I had the credits for it ! good Luck ! if I were you I wouldn't give that bill up it would be in my collection on my wall! lol