Time to buy Platinum?

Platinum currently is nearly the cheapest it has been relative to Gold in the last 23 years.
Just a quick look at the spread...
Gold may drop more relative to platinum, resulting in a regression to the mean. So Platinum doesn't have to go up for this to change.

Platinum may have demand in hydrogen fuel cells, so potentially a good future investment idea.
It is a fringe precious metal, with a high price volatility.