This is a what if topic, and again nothing goes down in an instant, even before two countries start war it will begin from somewhere, now let's say everything seize to exists with crypto, isn't this only possible if Internet stop working around tbe world? Because it's impossible that all coins just decide to die including Bitcoin.
If such thing is going to happen it will happen very slow, the red flags will be there and there will be enough time to exit the market, but let me stay on topic, that if crypto just vanish tomorrow, what will happen.
I will be stucked, because everything about me is crypto based, apart from few stocks that I invested in, I am more into Bitcoin and trading than anything else, I will go broke if this happen and will have to find other ways, it's not the end of the world.
The first thing that comes to my mind if crypto and blockchain disappear in an instant then my question is where does the money of people who have invested in blockchain go? Will it also disappear in an instant? If so then there will be a big chaos that will hit the whole world. The world's finances will probably be in chaos for a while. And for me this will make me lose most of my wealth because I invest a lot in Bitcoin and gold. Only a small part in other investments such as stocks and bonds. Yes this will make me bankrupt. But this will not make me lose everything because I still have half of my assets in forms other than cryptocurrencies. I might try to start building my wealth again using my other assets.