Actually, it's great that you brought up taking a shit!
Did you know that there is some value in never flushing anything but the real McCoy down the toilet? That is, only number one and two and toilet paper? Water works all over the world pay pretty penny every year to keep the sewers clear of waste that has no business being there.
Check this out:
I think with some development you could build a system that used sensor fusion (infrared etc. to detect the temperature and consistency etc. of things flushed down the toilet) to detect contraband. (You wouldn't believe the stuff some idiots flush down.) You could implement a token system where each legit flushing would be rewarded with tokens held on an escrow account. Each time you flush, say, turkey fat left over from preparing your Christmas meal, you'd be penalized by losing some amount of tokens. (Fat flushed down the toilet feeds rats and other vermin in the sewer network that cost real money to exterminate.) That would be an actual shitcoin!
Now, what's important here is the concept. I don't know if that concept would be technologically or economically quite feasible, yet. That would depend on if it were possible to reliably identify the most common types of materials and items flushed down the toilet that cause problems using sensor fusion and machine learning. The economics of the system would depend on how cheap the sensors installed in the toilet seat would be. Anyway, this is but one illustration of the near-limitless potential for the tokenization of life.