Satoshi's invention of a revolutionary form of money that would give people control over their funds back in 2009 (Bitcoin), turned out to be a success. While the cryptocurrency's PoW consensus is partially centralized (mostly dominated by the Chinese), it has a wide distribution of nodes all across the globe. Theoretically speaking, Bitcoin is decentralized where anyone can set up a node to support the Blockchain. With enough capital, it's possible to secure Bitcoin in our homes with sophisticated ASIC machines too.
So far, many people believe that Bitcoin is truly decentralized as "no one" controls it. But the harsh reality is that every single cryptocurrency and Blockchain network depends on the Internet to survive. It's no secret that in today's world, big companies like Google, Facebook, and even Amazon control the Internet. On the other hand, ISPs (Internet Service Providers) have a final say over what people can view or host using the Internet. This means that Internet is centralized, greatly defeating the purpose of Bitcoin and other cryptocurrencies of eliminating the middleman.
For Bitcoin to be truly decentralized, the Internet needs to be decentralized first. Once that's done, you could expect to achieve financial freedom that's out of the scope of oppressive governments, central banks, and large corporations alike. Until then, Bitcoin and all other cryptocurrencies will be subject to the risks of the Internet's centralization for years to come.
What are your thoughts?
This is the reason why the idea of a network inside a network was done. Some call it "deep" but its just another network, that can run on top of internet without being checked, controlled or blocked. The whole point these networks its to break from these.
Internet topology is actually decentralized, it was made so it could withstand nuclear attacks. You cannot destroy something in particular to stop it, tho the lazy way things have been running lately actually could cause major disruption, to those who weren't ready (ie. already using Tor, etc). Censor resistance is one way to view it, neither State nor private entities should be controlling you.
Something on internet could some better centralization, DNS for starters. While not strictly necessary, few people know the IP number of some basic sites, in case DNS goes haywire. So you could start replacing that by not using the "main" DNS (alternatives do exist). And so on we could go with each of the elements.
If things go really bad, Bitcoin could go "deep", and it still would work running in a network that runs safe on top of the unsafe network. This scenario is already improbable on a worldwide level, its possible in some countries. A more proper description is just running nodes and pools as tor hidden services or their equivalent in similar networks (freenode, etc). But this is a worst case scenario which seems to have already been overcome. Still, there ARE nodes running in there...
Can you use internet without Google? Yes you can. It takes discipline but you can completely get rid of Google from your life. Centralized social networks are even easier, its only the stubborn contacts that won't just use decentralized alternatives.