you can create and manage completely off line a bitcoin wallet (check glacier protocol).
you can also receive block through satellite and not just 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.
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