All of your numbers mean nothing. Two major spikes since 1971. Apart from that it motors sideways below inflation for many years at a time. Mmm I wonder why, maybe because it's abundant and mostly uneconomical to mine as a pure play.
Sure, it will always be worth something, just like any industrial metal i.e. not much. Have fun sitting around for the next spike - and make sure you sell because it won't stay high. Alas it can't stay high despite all the destroyed silver as you purport, which is just another indictment.
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