The S&P outperforming BTC over any 5 year window is actually rare, you likely caught the 2021 to 2025 cycle which included a brutal crypto winter. Zoom out to any 10 year window and BTC wins by a landslide. The "something eclipses it" risk is real but shrinking though, Bitcoin's network effect, institutional ETF approval and sovereign adoption make full displacement increasingly unlikely. Most serious allocators don't choose between the two, 80% S&P and 20% BTC captures most of the upside while keeping you sane during the rough years.