At least it never crossed my mind. That's too far from reality because bitcoin is too big to fail. The worst possibility could be the demise of an internet connection, but what kind of thing that causes the internet to fail worldwide, that's pretty much impossible. Even if the Internet dies nowadays there's a way to send it via sms or satellites. So long as people have their own coins it should be fine.
it's impossible to think about, unless a major disaster occurs in most countries it will cripple an internet connection and bitcoin won't be accessible at all. in fact, bitcoin is increasingly being developed and internet connections in most countries are certainly being improved so that connections can be obtained more easily and have a smooth