Hi ! First message here.
If a global disaster would happen on earth ( And I somehow don't wish it ) Would the value increase or decrease ?
I'm not talking about solar flares or EMP. But more like big wars or great natural disaster.
What are your opinions on the subject ?

Great natural disasters or big wars can possibly destroy international and intercontinental telecommunications. So it will slow down or even destroy blockchain systems too. I also suppose that USA's economic collapse could significantly increase value of cryptocurrencies.