I did not say that cultures did not value silver at all. I said that Gold historically is number one. Give anyone a choice around the world if they prefer to be paid in silver or gold ( equal values of each) gold is simply more likely to be their preference, other than making small change. Not my opinion, but reality- Gold speaks, silver needs an interpreter. Yes silver has value, it is also an industrial metal and demand at times exceeds supply, but it is also an expensive proposition to mine and process ores, especially the low grade ores that are typical today. Energy costs are a major factor, as is environmental compliance. That said, other than the $50 price spike, I find the premise that the global financial markets , mining industry and consumers of silver worldwide collectively are "missing the boat" and not "understanding" how rare silver is or isn't, etc. is a very unlikely scenario. There are no super-secret strategies. And the price languishes - even beyond ending the London fix, Morgan Stanley etc. it still goes sideways.
https://sdbullion.com/blog/how-much-silver-gold-is-there/
http://sprott.com/media/1834/the-silver-institute-world-silver-survey-2018.pdf
(Note that all silver coin and bullion is less than 15% of global demand )
BTW, Like you, I did not sell during the spike and frankly very much regret that. I have stacked silver and also have about 200 pounds of high grade silver and gold ore and have crawled all over the American west visiting both operating and inactive gold and silver mines, metal detecting, mine exploration, picking mine dumps, etc. so I believe I have pretty good handle on metals.
Since this is all a tangent on Habitat etc. I'm gonna end here.