> This is one of the most successful investment companies

It was for a long time. There is not a lot of evidence that's still the case (so far at least but even if the crash comes but its not big enough its not guaranteed they will outperform S&P 500 over a several year period).

Future returns are never guaranteed but over the course of the orgs history (since 1965) they've done a fair bit better than the S&P 500.... https://www.visualcapitalist.com/warren-buffett-vs-the-sp-50...