When I run into crazies (think scientologists, SJWs, nazis...) I tend to reflect and think – are we, in our bubble, crazy to think that bitcoin might succeed on a global scale?
My simple heuristic is asking a question "is this belief based on forcing others to do something?" If yes, it is not a good belief to have.
This eliminates groups like SJW, nazis... but still leaves, e.g., scientologists.
We know that Bitcoin is great but how do we make sure we are not the crazy ones?