Why would you wanna look at the past 100 years?
FX_IDC:XAUUSD dates back to 1975. The past 45 years should be enough for an analysis.
We had a wave 2 low of 100$ Gold in August 1976 and from there it went to 1911$.
There are only two scenarios for Gold. It will soon break down (could hit 1800 before breaking down). Or: If there is no breakdown, you can anticipate Gold reaching 3k+ $. My estimation is a panic high of 16k$. Yes, you read that right... 16k in the next decade is the bull scenario.
If the world we know falls apart because of a worldwide pandemic 50k+ is possible.