>>1475217What risk?
Having drugs sent to your door (and intercepted) is not a crime unless they can prove you are the one who paid for them.
But you're using tor and cryptocurrency so that isn't going to happen unless they decide to reveal the inner workings of their backdoors just to cuff you over some weed.
If you're buying a fuckton of weed and with the intention to distribute, I suppose they may try to catch you later.
Either way there is complete plausible deniability on the postal side of things.