Bitcoin attack question. Granted most people’s responses will probably be something to the tune of “we’ll have bigger problems than Bitcoin going down if this happens” what if the internet is shut off? The internet is centralized and run off physical cables. If those were destroyed, and/or any other scenario wherein there was literally no more internet, what future does Bitcoin have?

I'm hardly technically qualified to give a full answer on this but I have a few instinctive rebuttals: i) you can transact offline in a variety of (admittedly inferior) ways, ii) it's the UTXO set that really matters, and it would be preserved just fine until a new method of global synchrony on transactions was reached, and iii) there isn't really such a single thing as "The Internet", so the question is ill-defined anyway.