The key problem P2P technologies are going to solve, is monetizable self publishing. Self publishing is really the definition of P2P, and removing the middle-man is the name of the game. Bitcoin (not BTC) was invented exactly for the purpose of monetizing information, as the first sentence of the white paper defines it: "P2P cash for the internet."
The ideal scenario of exchanging money is the real world, in which we exchange money directly with one another with 0 (zero) middlemen.
The question which arises is, "What is the minimum number, of middle-men necessary for an internet transaction?" Could there be zero middle-men like in real life? The answer is no, zero middle-men are impossible, because someone has to keep the ledger data, and he requires a piece of the money transferred. With 1 (one) middle-man it is perfectly possible. The simplest such example are CBDC's issued by governments, but it could be a person, a P2P network or a company.
One use-case to illustrate the incentives is if Guyneth Palltrow visits the Oscars and she desires to publish a hundred photos to her fans. These photos are high-res of 10 MB each, so she wants to publish 1 GB of files. The most obvious place to share the photos is to post on Insta. She gets monetized by Instagram for all the traffic she attracts, but there are too many middle-men involved in her getting monetized. First of all Instagram is a middle-man, banks, and in case of international transfers governments as well. And each one of them gets a cut of the profits.
So Guyneth decides to publish her photos on torrents and getting monetized via Bitcoin. She effectively cuts out all middle-men, except one. But one problem remains: "How do we know who she is in the swarm of the peers, download the photos from her bandwidth and monetize her, instead monetizing random peers? We are her fans, amirite?"
That's where digital identities using ECSDA and social graphs kept immutable on a blockchain come into play. Hierarchies of identities for each person, merged into unions of pseudonymous accounts will enable information to flow where it needs to be. Money will flow where it needs to be as well.