Would btc be liquid ? How would you even send and receive even if you do own the private keys to your coin?
I am aware virtually all other aspects of our lives would be fucked properly more than likely before btc even comes to our mind if this were to happen (unless you were disproportionately invested i.e. majority of your portfolio is crypto). Still It's interesting to consider whether bitcoin really is comparable to gold in this sense - if the world really goes to shit btc aint helping noone. COVID showed us how fragile civilisation is it wouldn't take much...
I think having total Internet shutdown belongs to the list of the things that is nearly impossible to happen.
Although the probability of it happening is less than 99%, we can't neglect the fact that there's a slight chance it could still happen. If ever it will occur (but i hope not), most probably it will be very chaotic since almost every thing nowadays requires internet connectivity, not just in my country, but worldwide.
All platforms and all things that needs Internet including cryptocurrecies, will stop operating. I think all online operations will be put into an end and surely people will have a hard time adjusting like it was all back to square one. It will be maddening for most of us if ever that time will come because we'll have limited ways of communication and definitely none to limited ways on how we can recover our accounts and funds online.
But of course, technology and innovation is continually upgrading, that's why I think we have a little to worry about. What we should be afraid of IMO is climate change because it is irreversible and it will surely bring negative chain of events in the future that could possibly cause the happenings of the nearly impossible things.