I would say that the internet has become one of the most important foundations of the digital life that we are experiencing today and it would be easy to surmise that without the coming of the internet I don't think there can be the cryptocurrency industry that we have right now...it is not just possible. The internet united the global market for business of almost all industries, connect people of all countries except maybe North Korea and similar territories and successfully opened up many new possibilities that we have seen for the last decades that we experienced them. The internet is just like the invention of electricity which paved the way for the modern living to come and be experienced by all of us and it changed lives for the better. Now, in case the internet can be gone there must be a big reason for it...so I am thinking of a global nuclear war enveloping all countries just like the idea of a World War 3 coming to all of us in all corners of the globe. In this case, there is no need to say that life as we know it will cease and there will no more business to think about and there is actually no use for cryptocurrency as survival can be at stake. And lastly, even the use of the fiat money will not anymore be of use so we would have a chaotic economy by then. On the other side, StarLink of Musk may be able to provide us the internet connection we all need, if its satellites above will not be destroyed by China, Russia or Iran.