Why are you trying to rewrite history?  Armstrong did not predict jack shit because he said gold was going under $1000.  It's cost of production is anywhere from $800 to $1500 or so for different manufacturers, with the average cost supposedly being around $1050-1100.  Silver is probably around $16-17 for cost of production.

While there is such thing as sunk cost fallacy, silver is far far less capable of being sold under cost of production due to having more industrial use and demand with not much above ground stock (it's been in deficit year after year).

For anyone who doubts the power of silver, it now requires moving twice as many tons of earth to generate 1 oz of silver as it did 10 years ago.  I've seen claims we only have 20 years of silver and 15 years of zinc mining left, which seemed pretty insane, but when you look at actual mining industry stats like this, you can clearly see the low hanging fruit appear to be entirely depleted and something big is going on.

And here's a question you'll never see cryptoshills like Sidhujag able to answer: