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".
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.