Risen

This achievement along with



has had it's requirement changed. Despite what the achievement description says, you now need to hold 100,000 gold coins in your inventory.

At the end of my playthrough, after very thoroughly exploring and killing hostiles, looting all chests and using almost all pickpocketing opportunities, my inventory sold for less than 40,000.

The only way you'll get this much gold is using an exploit.

Collect all the Brugleweed ('Weed') you can find in the world and keep it. Return to the Bandit Camp, and seek the character Rhobart. He'll pay you 70 gold for a stack of ten weeds. You now can attack Rhobart, then loot his unconcious body. Once he wakes up he won't be hostile, and you can re-sell the weed. Rinse and repeat this cycle for as long as it takes. The more weed you hold, the more gold you earn - I sold 6 stacks at a time for 420 gold.

Be cautious as you can murder Rhobart when he lies on the ground, thus ending your income source. I recommend saving regularily and using multiple slots.