You'll notice Bron does take a more "mainstream" unfavorable view on silver where possible.
I am doubtful that Bron knows the full circumstances of the 1980's peak as I think he was very very young and gathers second hand information in forming his understanding. Yes silver that requires refining vs. silver bullion ready for resale are two completely different animals, conflating the two was an error.
Today if the paper market rises, bullion buyer will be falling over backwards to buy, as they sell the metal immediately and buy it back when selling to customers (hedging). Thus good dealers have little exposure to prices as they buy and resell to lock in profits. The greater the turnover the greater they make profits.
Things have moved forwards and we can learn a lot from the past.
It's up to you when or if you sell during a time, who knows what the peak will be so saying sell before the peak is just nonsense.