What are the chances of bitcoin going extinct?
The possibility of Bitcoin becoming extinct, of course there are several factors such as the internet in the world being completely dead and that is the only cause of Bitcoin becoming extinct. The world is experiencing a third war that uses nuclear weapons where all the access we use today goes back to the stone age. But of course this doesn't happen all at once, there are stages that need to be gone through. Do we expect that to happen? Of course not and hopefully that never happens.
For the world's internet connection being cut off, yes, I agree with you, it can affect Bitcoin badly. But is that even possible? That is the question we should ask ourselves. In my opinion, if the internet connection of the world is cut off, then it means that there is no world again, it's probably that something has gone wrong totally which I do not think is possible unless for the rapture. Also, about the war, I do not think that Bitcoin will be dead because of the war, it will remain as it is blockchain technology we are talking about. It will just remain the way people left it, that's even if people will not turn to it because of the war. You know what? War of the olden days can't be like this one, and for war to be happening doesn't mean that the internet and gadgets will not be working.
Even if they are not working in all places, they will be working in some places, so people with an internet connection will still continue to transact with their Bitcoin. The only issue is that due to the war, some places will surely be affected, and due to this, the patronage of Bitcoin might be little. This might either cause less demand and more supply, or the other war round, we can't certainly know the right equation depending on the war and how it affects individuals and countries.
Above all, Bitcoin will continue to operate during war, that is what I am sure of as war will not shut out all domains and all the needed infrastructure altogether.