Ok, as everybody seems not to care about gold, here is a completely different story:
I have two children, which means: NO TIME! I can´t do most of the grinds to get the items I want - so I need to buy them in many cases. I have to concentrate on the grinds that are efficient, meaning: bringing valuable items in a short period of time. These items I sell usually and with the gold, I buy the stuff I want. For example, I have no chance to get a slither or a crimmy, as it needs ALOT of time and luck to get one. But it is easy for me to get revamp-jewelry that is worth 50+ millions. So I farm about 30 min every second day and sell what I loot. And buy the slither instead of farming it. Same with most other interesting items.
Besides, I love shopping. Interestingly, most people here are not interested in gold and shopping. But I have an expensive hobby: Collecting wearables. Not rares, only nice suits, arties that fit. Optimizing my PVM-chars consumes most of my gold. A 190-Luck-Suit, for example, is not easy to make, I have no time for farming kits and I am not patient enough to try to get the best suit with reforging. Hence, I buy the pieces. Expensive... I know.
In consequence, I have always about 1 billion in cash in my vendors/bank accounts. You never know if you get the offer of your life and want to buy quickly the stuff, your heart desires. Had this many times - e.g. when somebody offered a Royal Investigator Cloak. Sometimes, shopping is like an addiction. I can´t help it.
But one thing remains true: There is nothing more thrilling, than getting the stuff dropped in your backpack. Better than any shopping success you will get.
And of course, this does not mean, that the true benefits of this game - social interaction, friendship and so on - are less worth. In contrary. But sometimes I want STUFF! And some stuff has to be paid.