you can create and manage completely off line a bitcoin wallet (check glacier protocol).
The blockchain is still on the internet.
you can also receive block through satellite and not just internet.
The sattellite is connecting to the internet, isn't it?
And, The blockchain is still on the internet.
decentralization is something really hard to achieve.
and for what we know (taking in account several index and pattern) there is just one crypto coins really decentralized.
Which one?
it's really hard to have another coin decentralized, from the scratch, probably it can happens, but PoW that helps bitcoin blockchain it's something close impossible to achieve
I agree, that is why I want to know what ideas other people have about this. The only decentralized payment method today is to exchange goods and services for other goods and services, which is highly unflexible.