i've been told since forever that in order for something to have value, you need to exchange it for other value

i am trying to understand your goal here, please kindly bare with me
here is my currently simple brain could understand thus far..

1. you are going to create a new coin
2. it will be based on the blockchain terms
3. it will be decentralized (mainly to prevent double spending attacks), and the consensus / block creation will not depends on "fiat buying power"?

"fiat buying power" means the power an entity able to purchase something for adding block to the chain:
1) POW consensus: gpus, asics, cpus, hdds, rams
2) POS consensus: The coins it self
3) Tendermint consensus: the voting is basically measured by entity power to buy a "node"

yes you may have a breakthrough and answer for those "centralized by fiat power" consensus system,
but will the value of this new coin trully make the developer/early adopters insanely wealthy?
if anyone could make that coin basicly without exchanging what they are currently having, what would become the coin value other than early adopters initial speculations?