There is no situation in which you have a broken government (i.e., refugee camps) where it is possible that crypto-currency will be useful. In refugee camps, even the doctors and aid workers have minimal access to the internet, and certainly not the type of stable connection you would need to transact crypto. Moreover, you would have extreme difficulty finding counterparties for the crypto-fiat exchange that don't charge usurious rates.

In situations where you just have broken governments, like Syria or Somalia, you generally also have broken utilities and private services, and internet is definitely low down on the list of priorities when you're worried about basic survival.