The way to truly private communication [reupload]

So I came up with an idea, which was evolving a few months.

Target:
A simple text communicator that guarantee us a total and transparent privacy.

The reason why:
Currently there is no existing tool that can be trusted to keep our conversation
Private. Of course there are some ways of communicating that declares that our
Massages are safe and there is no way anyone can read it…and we all know
the truth. As the reality shows, even when a company responsible for some communicator
(messanger/telegram/whatsup/etc.) has clear intensions and means to protect our
Privacy, they just can’t do it in some cases. Organizations like FBI, NSA, Interpol and
Every other government controlled unit are able to force them to reveal our conversation.
Behind that there is also a fact that most of currently working communicators are
Centralised which means that all massages are stored in one place. This leads to the
Obvious fact that it can be ( more or less ) stolen by hackers. As a consequence
Our conversations could be read by unwanted guys and exposed without our permission
Or even knowledge.

Previous solutions:
-encryption - unfortunately there must be some encryption key and its always own by
The same company or person that menages our conversation
-delating messages after a short period of time - (the snapchat like method) this
Solution sounds great but it is based on a trust that these messages are truly and permanently
Delated
-any other solutions are mostly based on our trust to a third company (that,i believe
we don’t need)

The solution:
A communication tool based on a web build of muliple and specific Blockchainins. I guess it sounds Confusing and probably tells you nothing so here’s a simple explanation.
Let’s imagine 4 people: A,B,C and D. Now A writes a message and sends it to B. Before
Being sent, it becomes encrypted.Here we need a „transmitter” ( node ). Instead of using some server or satellite, we use Person C as a node. Later B wishes to reply to A, so the message is written and sent.But it does not „travel” through C, now D becomes a transmission node.We made an A->B->C->D, this is the beginning of a blockchain. There is a possibility to decide how
Long would this blockchain be, by the beginner of a conversation. If the amount of massages
Is bigger then blockchain length, first block are being destroyed.

Why:
-There is no central node, which stores or „only transmits” our massages, so there is
No way that our whole conversation exists in one place and at the same time.
-Every conversation is a separate blockchain.
-The person which begins chat can decide if the blockchain consists of 2 or infinite blocks.
-Massages are encrypted and can be read only using a private key, so the nodes are unable
To see what they transmit.
-Private key is being sent through a different node, so there is no possibility that a node has
A message and an encryption key at the same time.
-Every user with app installed and internet connection, is sometimes randomly chosen to be a
Node.
-When a user becomes a node, he isn’t informed or unaware of being a node, but is given
A token in a passive way. It is a way to reward users for being part of a web.
-Everyone is given some tokens after registration and there is an obligation of having specific
Amount of them to use a chat.

If anyone found this interesting and maybe wants to help me in developing process, feel free to contact me.
If anyone found this interesting and thinks that im not needed in developing process, feel free to use my idea without any permission.

Hope someone found this reasonable and not senseless.