There's actually a new coin now called Pot Coin and it's promoted by Dennis Rodman. It's an altcoin but it's dedicated for buying and selling weed. It's "brilliant" if you look at it, but it really is not that great if you take a second look at it. First, there would be a digital trail. Even if let's say that the coin is anonymous and that you don't have any whereabouts placed there, it will still leave a digital trail. And having a digital trail can eventually lead to getting yourself caught.

Secondly, the item will still be delivered to you. The item will still be given to you and people will see your face. You can use an escrow but you have to make sure that he will not snitch on you. A lot of things can happen even if you're using a cryptocurrency to buy something illegal.