user81124: By looking at the bitcoin and ethereum mining pool hashrate distribution I feel that only 5-10 relevant full nodes exist. So it's more like a federated system among those.
Am I seeing something wrong here?



user81901: Yes Bitcoin and Ethereum are still decentralized. What happened is it got to risky to mine solo so miners banded together to have a better chance of getting blocks. I suppose you could say that Bitcoin or Ethereum could be federated but the fact that these pools are competing against each other destroys that idea.
 Federated means (with reference to a number of states or organizations) form or be formed into a single centralized unit, within which each state or organization keeps some internal autonomy.* According to the definition of federated I would rather say that each mining pool is a federation of miners in itself. But with all these different federations involved it is still decentralized system because not one of these federations control more than 50% of the hashrate.
*Definition from Google Dictionary 

81124: <p>By looking at the bitcoin and ethereum mining pool hashrate distribution I feel that only 5-10 relevant full nodes exist. So it's more like a federated system among those.</p>

<p>Am I seeing something wrong here?</p>

<p><a href="https://i.stack.imgur.com/lgTUN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lgTUN.png" alt="enter image description here"></a></p>

<p><a href="https://i.stack.imgur.com/lpaPI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lpaPI.png" alt="enter image description here"></a></p>
 81901: <p>Yes Bitcoin and Ethereum are still decentralized. What happened is it got to risky to mine solo so miners banded together to have a better chance of getting blocks. I suppose you could say that Bitcoin or Ethereum could be federated but the fact that these pools are competing against each other destroys that idea.
 Federated means <code>(with reference to a number of states or organizations) form or be formed into a single centralized unit, within which each state or organization keeps some internal autonomy.*</code> According to the definition of federated I would rather say that each mining pool is a federation of miners in itself. But with all these different federations involved it is still decentralized system because not one of these federations control more than 50% of the hashrate.</p>

<p>*Definition from Google Dictionary </p>
