I think the gold-oil link that has lasted for over a century is being severed.
New energy technologies are coming on line that will eventually cause the obsolescence of fossil fuels and the gold-oil link is necessarily reflecting that.
There will be a lot of disruption surrounding that delinking given the number of existing geopolitical power structures, petro-dollar debt-based fiat, bonds-for-oil, gold-for-oil, similar inter-national agreements and the mountain of derivative deals that are based on these fundamental long-term linkages of energy and money being broken.
tl;dr oil is being demonetised