Crypto market is very strange and not necessary correlated to traditional financial market, so if there will be a global crysis it's not certain that also crypto market will suffer because the biggest coins like BITCOIN and ETH could be a good alternative to $ or EUR.
I'm really hoping this will be the case. I'm worried though that if people lose faith in dollars and euros they will also be scared of cryptos as they are so new. In which case, the best place to have your money may be commodities, like gold and silver
May be a good idea not to have 100% of your assets in crypto, just in case