No that would simply lower the long term cost of gold since its demand would drop to the floor. If they found a comet made of gold tomorrow that could be reasonably and cheaply mined and return back to earth in a reasonable amount of time, the value of gold would start to decline since the supply dramatically increased.
This is neither gold, nor is it a fixed supply side. But the information in all directions is near perfect, and the liquid supply is throttled based on user dynamics. This makes for a far more stable price and much more predictable market dynamics for all.