I think you can either do or not do things without the negativity. I found that the negativity made me think emotionally and not rationally or productively, and also sometimes came off in my conversations with people which was also not helpful-because I was clearly very emotional about the issue.
My thought process is whatever happens, happens. I can't do much to prevent whatever systemic collapse that might happen or not happen. But whatever I can do, I will. When I first learned about this, I thought it meant the future that I took for granted could be nonexistent - the dying happily carefree of systemic collapse part after having a family and growing old. It made me bitter and resentful. What's the point of doing anything if the world's going to go to shit by 2030? I decided to be more optimistic or maybe stoic. Make sure I can do what I can or all I can and not let some potential apocalyptic future darken my life. Sorry if this is a trash comment.