The downside of skepticism: it can easily turn into an arrogant position of a priori rejection of any new phenomenon or idea, a position that is as lacking in critical thinking as the one of the true believer, and that simply does not help either science or the public at large.

I believe Stoicism can help anyone who takes it seriously and begins to practice it. It will help them flourish because it will provide them with a compass for navigating life, a general, flexible, framework to set priorities, and a set of techniques to achieve serenity and equanimity.

Death itself is a natural occurrence, it is unavoidable, and the Stoics thought that part of philosophical practice is to get comfortable with the unavoidable, learning to face it with courage.

I don't see any Stoic practice as problematic or risky, but I would advise to engage in extreme versions of the negative visualization exercise only if you are an advanced practitioner. The negative visualization is a meditation during which you visualize, slowly and deliberately, something bad or discomforting happening to you.

The downside of skepticism: it can easily turn into an arrogant position of a priori rejection of any new phenomenon or idea, a position that is as lacking in critical thinking as the one of the true believer, and that simply does not help either science or the public at large.

Often we can change things, and a realistic attitude - including envisioning worse case scenarios - actually helps to accomplish that change. But if you truly cannot do anything about something, then why on earth would you want to make things even worse for you by falling into despair? It seems like adding a self-inflicting injury to the already existing one.

In my mind, there is no reason why Stoicism shouldn't become as popular as Buddhism, especially in the Western world, where the dominant culture, Christianity, itself absorbed a large number of elements from Greco-Roman Stoicism.