Real world crisis will make jobss easy for cryptocurrencies i think. Peoples will begin to debate the value and credibility of state money. Crypto money will gain more credibility.
This will actually make the cypto currencies more powerful because when the investors will not get any return on financial asset class then they will switch to other products and thus cypto currencies will be on their plans. Thus a huge investment would be received and demand will soar thus leading to more high price rise.
Wont BTC and all cryptocurrencies also fail if there was a global financial crisis? The traction BTC has gained is not enough to make it a self sustaining financial system because we still base its value on fiat. Think about it, it's fiat that's making BTC fly. Without it we would not give a crap about BTC.