[Think of it in this way. There is another world war because of this IRAN tension. A destructive war would mean that banks, paper currencies and gold can be destroyed but blockchain will survive because of its decentralize nature. No one can destroy the bitcoins even in the war, so does not it make it the best investment ?
If banks are gone and gold is reduced to a useless rock and you approach the guy hoarding water, antibiotics, food, naked women and bullets and start noodling on about your scrap of paper with useless numbers on and how he should be honoured to accept it you'll probably wind up with a machete buried in your forehead.
