So since we are going to die in a nuclear fallout it seems what would you do with the time you have left if it was truly the end?

I wouldn't be looking to build an underground shelter just yet. Biden only has a few months left as an unelected president before the Kevin McCarthy House impeaches him and the Senate removes him from office. It's never too late to be optimistic. Kamala the Ugandan Giant will damage her party so much domestically, that Putin will be too busy laughing to even think about pushing that button.

The world had a bigger reason to worry during the Carter Years, when the Soviet Union marched into Afghanistan. I think we have time for cooler and more intelligent (read, REPUBLICAN) heads to prevail.