If the world temporarily lost the internet, probably nothing too serious would happen to bitcoin, but if the internet suddenly stopped working for a long time or disappeared, that would mean bitcoin would no longer exist. But the internet is like water in our world, without water the world will perish and if the internet is lost the world will stop developing and return to the stone age. So this scenario will never happen so you don't need to worry and think too much about this issue.

I can't think of any scenario in which the Internet could disappear from the world, even World War III wouldn't make it disappear. Unless we encounter the destruction of the earth like the time of the dinosaurs.

Internet is number 1 requirement for Bitcoin to continue, I've read some thoughts in the past about having radio waves and satellite signals, I'm not sure if that's doable but it seems promising as an alternative to the internet if ever doomsday will ever come. If it will come as a means of doomsday, I don't even think that there's something to worry with as we're all doomed by that time.

Bitcoin remains to be existent even if there will be a shutdown of internet. Its operations, transactions and confirmations will be stopped if the entire world will have no internet at all. But with all the modern technologies that we have, it's interesting to read if there are good people working on this technology just to be prepared when the unexpected has come to the world as it won't only cover Bitcoin but also the companies that are solely reliant to internet for its daily operations.

I think we have seen many threads created on this exact topic and the answer remains that without internet the bitcoin network wouldn’t exist and aside that many things in the world will stop to function. Banks cannot process your withdrawals and as such even to get physical cash from the bank will be impossible except for those who hoard or stach fiat cash at home. Even places like hospitals will be in trouble since some machines works with internet connections there too. So bitcoin will be the least of all worries if the internet collapses except for someone who has its funds all in bitcoin

 
If it is slightly for 24 hours some people will panic and when it comes up again I believe there will be FUDs spread about it and could lead to some investors taking some coins off and turning them to cash. On bitcoin network all transactions will just stop and continue later once it gets back. Since it is a total universal shutdown nothing will change in the network, if it is Some part that experiences that then after they have internet back they can just synchronize or update their servers back.

No Internet, no live trading, no short term dump that only occurs after Internet recovery.

With thinks like cash in banks, you can go to bank office and withdraw your cash. Banks can not refuse your withdrawals because they don't have Internet connection at the moment.

Don't lose your coins and can wait for for Internet connection recovery to see things in society includes Bitcoin market to operate again. Will it cause stock market dumps, I don't believe it will happen so thinking like it will cause Bitcoin dump is not convincing to me. It is too much fearful in my opinion.

The bigger question you should try to answer first is, what will ever happen in this world that will take internet off, if it humanly possible the attack could have been done by now, so as long as internet can go off same with Bitcoin and that is why bitcoin is referred to as the currency of the internet, so let stop assuming the possibility of that and focus more on important issues to discuss about.
Internet is a global tool, and this have it basis on government since the government also rely on the internet to survive in it operations, so if government is not against internet, what then can be against it although I most say that the internet is the basis for bitcoin existence so if anything goes wrong with the internet, there won't be access to many things and that also includes bitcoin blockchain and wallets, so alot depends on the internet, that is why everyone is protecting the internet with all the strength in them, government taking the leads.

Agree with OP that anything can happen but honestly, I've never thought about the worldwide internet disruption scenario and I don't think it will happen. Because that would cause terrible damage to our world because our world is almost digitized and everyone is connected to the internet to a certain extent. But if the unthinkable does happen, I believe that bitcoin like other internet-based services will be temporarily disrupted and will cause some temporary panic, and everything will return to normal once the internet is restored.

First, can you imagine what will happen if the internet stops working? Not only Bitcoin will be affected, but many things will stop working, and it's going to affect everyone. It's going to reduce the productivity of many companies, and for those people that are keeping their coins on centralized exchanges, they will be stuck there till everything starts working perfectly again. But if you have your coin in a self-custodial wallet, you don't have to be scared because your coin is safe there until the internet connection is restored.

So far as I know, it is not possible for the whole world to go completely out of internet connection.It cannot happen; even if it does happen in the future, it will only affect some countries. 

Bitcoin is a protocol just like the mail protocol on port 25, or the file transfer protocol on port 21, bitcoin works as a protocol on port 8333, and it needs the internet to work fine, Without internet people would be able to create and sign transaction but not to broadcast it in the network. This is like trying to send an email without the internet, it is just impossible.

If the internet is just gone for 24 hours, then things will get back to normal when the internet comes back, all will auto-connect again.

Why the hell not?

Bitcoin exists on the web, it’s a digital asset and should the internet be inaccessible for whatever reason, either some apocalyptic change to reset the world order, we wouldn’t have our way with Bitcoin.
Eventually, this can never happen. Bitcoin isn’t the only innovation to use the internet. It’s a network highly patronized by every field in our world as we have it, largely by the government as, through the armed forces, the very idea of the internet was birth.
The internet is going to be around for such a long time, get more advancements to it and so will Bitcoin.