I think even a significant change in the economy wont necessarily be big for btc. I mean look at what happened in Greece. People tried to bring a bunch of btc atms into the country, but it was too little too late.
And you really think in an economic emergency situation people will be thinking "how can I get my hands on some bitcoin?" I doubt it. People will be raiding grocery stores, etc. Some may buy some btc, but it wont be enough to jump the price.
That is true. Too many end day believers in this forum is not seeing this fact correctly. In the event of sudden economy meltdown Bitcoins are the last thing you could use to get your groceries.