The founders doing well is not mutually exclusive to the overall crash as experienced by the public. Also, a lot of founders are doing well even before they take on a venture. 8/10 founders from successful high growth startups self report as middle to upper-middle class background and 50%+ have elite education from top 10 schools.

You're right, the broad market drags down all retirement savings and those who are about to hit the age of 60+ pay most dearly.