no profitable way to maintain a nuclear arsenal

I hate that it’s important to maintain a “everyone dies” card, seeing as the only country we’d use nukes against would be a country powerful enough to have their own nukes, and these are getting fired for the sole purpose of ensuring that literally everyone goes out with us. I get that they’re also deterrents, but the deterrent here is that this is our “everyone dies” card; I genuinely doubt any other nation would be the first to fire a nuke.