Galvon your right, gold has no worth but your wrong. You may have no need for gold but that's because you are in the 1% of players that are gold capted (or have been) and know ways to make gold. You may not need gold but others 'do'. People who see everyone else on their epic flyers and mamoths are the ones who 'need' gold. The people who can't meet their repairs are the ones who need gold, or the leveling newbie that decideds that they need the cool thing on the AH.
You see things from your tower of gold like scrouge duck. You must remember that you are not like the avrage Jo, you have an economic background and weigh an epic flyer as useliss since you still can't make the flight time. Because of what you belive is helpful to your project and what is not, you have given a gain level to everything, you must consider you have excess gold for your 'needs' of repairs, food and drink and at that a big excess.
The avrage Jo wants what he dosn't have. Epic flyer, mamoth, chopper, epic loots, vanity items and rare pets. They don't have gold for this, these are the people that belive that gold has worth, because to them it dose. A true and clear example of this is the fact that I was able to pay in gold for play time via RaF people are willing to pay real money for gold. It must have some worth to someone.
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In me related news I sold my rooster for 52k on the AH, 49.5k in the hand from that very glad. Got alot of hate for spaming to sell it but it was worth it.