In GW1, you didn't need much gold at all to get max gear. Just picking up stuff and selling it was plenty, if you were careful not to get every skill but just those needed.
But then people wanted elite armors (which are purely cosmetic) and they wanted to fill up titles such as drunkard which cost money. The HoM was also costly. So if you go for those kinds of things, then it becomes more important.
Fair to assume the same will hold true in GW2.