After the 2007/2008 financial crisis—the worst financial crisis in the history of the US—the S&P500 dropped 54.1% from peak to trough. BTC is currently down over 80% since its peak.

Let's also make sure we understand that the S&P500 (or any stock ownership) is owning _business(es)_. Businesses make money, and they return that money to their owners. Bitcoin is purely speculative and depends on someone else buying it from you, presumably for more than you bought it for. Good luck finding another batch of suckers to fall for this after that last round.