That's not the point. You can cherry pick stocks that have outperformed the S&P500 too.
The point is that USD isn't for holding. It's for spending. BTC is more like a stock or asset than money. Money isn't supposed to be volatile and it's not supposed to appreciate in value.
The discussion was about perceiving bitcoin as stable or not. I brought up BTCUSD contrast, but I can bring BTCSP5 instead (with the same point), without your concerns about USD not being "holdable".