Bitcoin needs Internet. So I dont see this as "Bitcoin" question at all.
If there is no Internet, there is no Bitcoin.
Correct me if I’m wrong, but I think that someone out there is now trying to make BTC transactions accessible even without the internet.
This is kinda old news though:
https://www.thehindu.com/sci-tech/technology/blockchain-transaction-tested-in-space/article33971816.eceHowever, anything is possible coz’ there are many scientists and innovators out there who are trying to do something out of the box. Let’s just see then.