Bryan Johnson is an entrepreneur who has spent $2,000,000 on an anti-aging routine. The routine involves various treatments like cryotherapy, hyperbaric oxygen chambers, and stem cell injections. Johnson aims to extend his lifespan and improve his cognitive abilities through these procedures. However, there is no scientific evidence to support the effectiveness of these treatments, and many experts believe that such extreme measures may not be worth the investment. Nonetheless, Johnson remains hopeful and continues to advocate for the benefits of such a routine.