for me, probably if global economy will crash, crypto space will remain fine in my opinion , because they are not connected and no one can control digital currency unless if they ban mining activities because it always made an impact in the market.. And you know there's a possibility that people will going crazy to grab digital currency if that time happens because there's a big differential when it comes to prices, and in fact digital currency is so high tech become very useful nowadays even some government are against.  So there will be a chance to replace fiat to crypto in my personal opinion.