Everyone is talking about Gold's ATH crossing 5000$ in a "gold bull run" , But we offen forget that Gold is the unit of value measurement - stable by definition . The charts below show clearly just how far the once mighty US Dollar has fallen.
Now before we dig deeper into this you need to start seeing the chart from a new perspective, by looking at gold as the measuring unit -instead of the dollar- you can clearly see how USD price has been crashing for decades, and how it's taking every fiat currency pegged to the dollar or with a dollar reserve down with it .

Until 1933, people carried gold coins in their pockets, and paper bills were exchangable for gold and silver coins at any bank. Prices were remarkably stable, and had been for a hundred years or more, except for periods of war or other disasters . In 1933, US citizen's gold was confiscated by the government, the dollar was devalued by 41%, and we entered a period in which the treasury attempted to hold the value of the dollar at 1/35 of an ounce of gold.

As you can see, this was largely successful until the late 1960s, when so much gold was required to buy up all the dollars foreign countries were selling that the US government simply gave up, and "closed the gold window" in 1971. The value of the dollar collapsed over the next 10 years, hitting bottom in 1980. By paying high rates of interest and reducing taxes, the dollar slowly recovered some of it's value over the next 20 years, but expansive money policy in the 1990s eventually caught up with the dollar in 1999.

Since 1999, the dollar has fallen in value from about 123 mg of gold to less than 21 mg today – a drop of more than 80%. Overall, from 1900 to 2010, the dollar fell from 1500 mg to 25 mg, losing over 98% of it's purchasing power. Penny candy now costs 50 cents. The "Five and Dime" is now the Dollar Store.
To but it into prospective, a 1000$ up to 1920s could buy you 1.5 KG of gold !! That's a little more than 48 ounces of gold , from 1940s to 1960s a 1000$ could still buy you 0.9 KG of gold !! That's almost 29 ounces of gold , Nowadays, that same 1000$ buys you 0.0062 KG of the precious metal - not even 7 grams - wich is 0.2 ounce of it .

The future, however, looks even worst . Some comments from the Federal Reserve indicate that near-zero interest rates and "quantitative easing" (Fed-speak for money printing) can be expected to continue "for an extended period".