2 Chainz Smokes a Gold-Covered Joint ,Most Expensivest Shit. 2 Chainz embarks on a special adventure to smoke the most expensive joint in the world. See what happens when the rapper and celebrity medical marijuana consultant Dr. Dina get their hands on rolling papers made of 24K gold, weed so good it costs $800 an ounce, and a ridiculously large pipe.Check the video out below.