Personally, I think short term traders will be affected the most, provided the crash really does happen. Since most cryptocurrency owners are relatively new to the market, as soon as a market crash happens there will be a sell trend to cash out with big gains before the market gains stability. But as I said, since crytpocurrencies have not been tested against a real world financial crisis, it is hard to say what will happen. But whatever happes will pave the way for future of cryptocurrencies for years to come.

As for how one should should prepare, no matter what you do, if you live in one of the countries crisis happen in, there is not much you can do. If you are not a big player you are bound to lose - believe me when i say it, I have been through 3 local and 2 international ones in my lifetime - Interest rates will go up to support the market, but what good does it do if the banks also go down?