No gold should never have weight. You trade items you can't carry for money. Trading it just for a bit less weight doesn't seem appropriate. It doesn't add anything to the game and is just a hassle to keep an eye on. That said, please make money very, very sparse. I HATE when I can't buy anything interesting anymore because I have so much money that I already bought everything. There are really only a few games that have their eco system working. Make selling gear 1/10 of the buying price instead of the typical 50%, and keep the drops rather low. You should be forced to make choices, gear towards a specific thing etc. Optional, difficult quests can yield some cash, but I don't think it's a good idea to get an epic item's worth of money just for moving from a to b.
