What is the maximum amount of gold you can have in World of Warcraft?

The current maximum level in World of Warcraft is 85 (with the release of World of warcraft Cataclysm, which you must have upgraded your account to).

If you have not upgraded your account, then here are the max levels that you can reach:

Wrath of the Lich King account - 80

Burning Crusade - 70

Vanilla (original wow) - 60