First published by Money Metals here: https://www.moneymetals.com/news/2019/01/31/gold-supply-crunch-coming-001706

During the lackluster and otherwise unremarkable trading of 2018, a hugely important development took place in the precious metals markets. Gold production, in the estimation of some top industry insiders, peaked. Peak gold represents the point at which the total number of ounces being pulled out of the ground by miners reaches a maximum.