Okay, well in the interest of helping out the new folks... here are some (but not all) of the gold related items we are talking about:
Goldwrap belt: On gold pickup: Gain armor for 5 seconds equal to the amount picked up.
Boon of the Hoarder gem: (at max rank 50) 100.0% chance on killing an enemy to cause an explosion of gold. Gain 30% increased movement speed for 2 seconds after picking up gold.
Avarice ring: Each time you pick up gold, increase your Gold and Health Pickup [and progression globes] radius by 1 yard for 10 seconds, stacking up to 30 times. (or could use Thing of the Deep mojo geared/cubed for WD)
Goldskin chest: Always rolls 100% GF (Gold Find)
Kymbo's Gold amulet: Picking up gold heals you for an amount equal to the gold that was picked up for gold=healing.
Emerald (green) gem in helm to increase gold find (flawless royal emerald +41% GF).
Leoric's Helm: Increase the effect of any gem socketed into this item by 75–100% (maxed at 100% in cube)
Max out GF in Paragon Points (utility).
Also... getting insane amounts of gold can mean getting a decent experience boost with..
Custerian Wristguards bracers: Picking up gold grants experience.
These are the main items you should know about, but there are lots of other legendary items that drop or can be crafted to increase gold find and/or increase pickup radius (e.g. you can craft Corruption shoulders to increase your pickup radius even if you can't work an Avarice ring into your build). Search for more discussions and youtube videos if you need more help. Lots of info out there..
As a side note, for the Avarice conquest: green gem in helm, rank 50 boon of hoarder, GF maxed in paragon points, T8-10ish, Ruins of Corvus Act 5.