Hard to predict the future, especially when it comes to money. I’m sure your dad meant well.
My father’s advice about selling the silver coins was good at the time.
Silver was at $50 per ounce in 1980. The Hunt brothers of Texas has cornered the market, then it all came crashing down and nearly took the stock market with it. Congressional hearings followed (of course).
I sold the coins just before the price per ounce came crashing down. It was nice to sell at the top of the market.
Silver took 45 years to get back to $50 an ounce and beyond.