Right now the battle is to control the majority of all available gold supply. As long as there is still physical present that can be extracted from current holders, and no other catastrophic catalysts occur, the game continues. Basically, anyone who can be persuaded or forced to sell his physical holdings is a target and will be squeezed until there is barely any but direct mine supply available from mining operations that can't be nationalized.
That's when revaluation is guaranteed. It's a possibility at any point from now until then - the probability just increases until that limit is reached.
The concern that tvbcof expressed about excessive concentration is real and valid. If there is too great a centralized holding of gold, whatever authority has it will wield an undue amount of influencing power. Yet again, that's where Bitcoin comes in