I'd sell it now. In the long run people will be saying "Taylor who?"
You have a point, but I think it's worth keeping in pride of place in a glass cabinet for a few years yet.
Taylor Swift poop is a scarce commodity.
Pooping at max capacity, there is only so much poop Taylor can create in her lifetime. If every person on earth wanted to own *just one* mason jar of Taylor's poop, there wouldn't be enough to go around.
Supply and demand, Econ. 101, you figure it out.
CCMF!