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DAO fork has absolutely nothing to do with PoS. This is nonsense.

Actually it did.

> There’s another wrinkle: The Ethereum Foundation is on track to switch to a new consensus mechanism called “proof of stake”, and in that scenario, anyone who owns 14% of all ether will have tremendous control over the future blockchain.

https://www.coindesk.com/understanding-dao-hack-journalists

DAO fork showed Ethereum to be centralised similar to a company therefore a database or PoS for the blockchain is a better fit than PoW

This is nonsensical. PoS is a mechanism for assuring transactions can get added to the block chain securely. It has nothing to do with whether the controlling interests are centralized or not.

PoS is only suitable for more centralised projects. For Bitcoin it would remove the properties that make the network unique

If you could take control of all the miners, how much would it cost to rewrite the chain?

If you could take control of all the stakers, how much would it cost to rewrite the chain?

Answer this honestly and you'll see why people trust PoW much more than PoS.

Reply on news.ycombinator.com