I have terminal cancer and have believed in AGI doom for much longer than I’ve know I have cancer. Neither of these things made me depressed. Perhaps that is because I’m pretty close to an existentialist.
I would also like to add that even if you’re not making long-term investments (I’m certainly not), maintaining good health (as best you can) is always worthwhile because it directly leads to higher quality of life.
I voted No, but I don’t think there is anything wrong with pushing the button. The “gods-eye” view of utility is simply wrong (or incoherent) and it’s what causes most of the utility paradoxes. No one experiences not existing after pressing the button, so no harm done.
[Edit] I should qualify that voting Yes on this question could potentially do harm. So if you’re going to press the button, better to do it silently.