There are 2 “MONEY AIN’T A THANG” titles.
The correct one is for “Slay Greed on Torment XIII difficulty. Treasure Goblins outside of Nephalem Rifts will sometimes open portals to Greed’s domain, The Vault.”
The incorrect one is for “Kill the Skeleton King at level 70 in under 30 seconds on Torment XIII difficulty.”