Since zero people hold their retirement savings in cash, a more honest one would be an S&P chart, and a btc chart, and then circle all the drawdowns on both, and wish them the best.

Or you could, like, explain how the elements fit together with a pricing model. Like I originally asked for.

But you give the advice you think will be most helpful in your role as Uncle Jim. I'll do the same. Best of luck to your loved ones.