He's probably trying to claim that the 10x increase in the price of gold over the past ten years is a 10x decrease in the value of the USD rather than a speculative bubble in gold. (And even if it were, it wouldn't be remotely comparable to the 10x decrease in the value of Bitcoin over the past three months.)
As a sidenote, that's a terrible graph(as are most graphs of this nature). There's a wonderful technology called a logarithmic plot for that sort of thing.
