We definitely need more private and decentralized internet. However, I'm not sure if blockchain is the right way. Blockchains create trust and allow consensus along with a large number of nodes. But they archive this by copying everything everywhere. Can you imagine, that every computer connected to the internet would also store everything on the internet? Even with technologies like sharding, this would be ridiculous. I think you should rather look to solutions based on onion routing (TOR). There's still a lot of work to be done to achieve good decentralization and good speed at the same time. Sybil attacks are also a big problem in these networks.  If someone could solve these problems, it will be a true revolution in terms of privacy. But be aware of NSA/CIA/GHCQ/FSB and other agencies.