The Unicode 10.0 spec adds code points for vampires, hedgehogs, pretzels, flying saucers, Chinese-delivery-style takeout boxes, and the Bitcoin currency symbol (which may as well just be the Thai baht symbol)...
...but they still have nothing for cannabis, which has been around far longer than any of these things.
I just don't understand some folks' priorities. I mean, seriously, I challenge any of you to name a single person who smokes hedgehogs. Am I right?