Three areas I'm looking for to tell me when we reach the end of this gold run are as follows.
1. When the Dow and Gold ratio is 2 or 1 to 1.
2. When US foreign debt is offset by the nations Gold reserves.
3. When you can buy a US average new home for 100 or less ounces of gold.
In the mid 1930's and early 1980's when gold reached it's peak you could buy a home for less than 100 ounces. I ultimately believe this will occur again sometime in the next decade.
Source:
http://www.thepeoplehistory.com/1935.html
http://www.thepeoplehistory.com/1980.html