The social phenomenon of poor people pretending to be rich is way too rare to have any influence on other things, like Bitcoin. What you're asking is if Bitcoin is a status symbol, and it's obviously not - you can own even tiny pieces worth less than $1. You can't show it off, if you'd tried to post a Bitcoin signed message on social media, no one would understand what it means.
What is gonna happen once the post-apocalyptic scenarios come true? When/if there will be no electricity, computers, phones, etc.? People will value no US Dollar backed by state promise to pay off debt… your decentralized piece of code will not exist anymore (I do know about some offline-friendly cryptocurrencies)… only gold or natural resources will become valuable again.
Who cares about post-apocalyptic scenarios, if they would actually happen, 99% of us will be instantly dead.