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Proof of work vs proof of stake

Proof of work vs proof of stake

Proof of work secures a blockchain with energy. Proof of stake secures it with the coin itself. Proof of work is open to anyone, pays those who do work and not those who already hold the most coins, and gives the strongest censorship resistance in crypto. Its two old limits were speed and scale. Quai removes both.

The difference in one table

Property	Proof of work	Proof of stake
What secures it	Energy that miners spend	Coins that validators lock
Who can take part	Anyone with hardware and power. No permission, and no coins needed.	Only those who first buy the coin. An Ethereum validator needs 32 ETH.
Who gets new coins	Those who do the work	Those who already hold the most coins
The true chain	Objective: the chain with the most work. A new node needs no trusted party.	A new node needs a recent checkpoint from a source that it trusts.
Cost of an attack	Paid again every day, in hardware and energy	Paid once. A majority staker keeps its power until people agree to fork it away.
Link to the physical world	Energy	None
Who can be pressured	Miners need no identity and can move across borders	Large validators are known companies: exchanges and staking pools

Why proof of work wins

Censorship resistance

A miner needs no account, no license, and no stake that someone can seize. In proof of stake, the largest validators are exchanges and staking pools that regulators can reach. After the United States sanctioned Tornado Cash in 2022, most Ethereum blocks for a time came through relays that left out sanctioned transactions.

Open entry

To mine, you buy hardware and power on the open market. To stake, you must buy the coin from the people who already hold it. Proof of work has no gatekeeper.

Fair issuance

Proof of stake pays new coins to the largest holders, so the largest holders stay the largest. Proof of work pays for work. Coins leave the hands of miners, because miners have real costs to pay.

Objective truth

In proof of work, anyone can check which chain has the most work with nothing but the data. Proof of stake needs checkpoints and, in a crisis, a social decision about which chain is real.

Attacks cost money every day

An attacker on proof of work must keep paying for energy. An attacker who gains a majority of stake keeps that power, and only a fork that people coordinate by hand can remove it.

Money with a real cost

Proof of work ties a coin to energy, a cost outside the network that no one can create for free. That anchor is what makes energy-based money possible. Quai's Qi token cannot exist on proof of stake.

What about speed and energy?

The case against proof of work was never about security. It was that Bitcoin is slow, and that its energy does only one job. Most of the industry accepted that and moved to proof of stake.

Quai rejects that trade. It keeps proof of work and removes the limits. Blocks arrive about every 5 seconds. A hierarchy of merge-mined chains adds capacity as demand grows. The EVM runs on the base layer.

The energy does more than one job, too. Workshares pay near-miss attempts. Through SOAP, the same work also mines four other chains, and their rewards buy and burn QUAI. With x402 Work, a few seconds of the same work pays for a web request.

Questions people ask

Is proof of work more secure than proof of stake?

Proof of work has the longest record: Bitcoin has run on it since 2009. Its security comes from energy, a cost outside the network, and anyone can check the true chain with only the data. Proof of stake depends on its own coin, on checkpoints, and on large validators that are known companies.

Which is more censorship resistant?

Proof of work. Miners need no identity, no license, and no stake that someone can seize, and they can move across borders. In proof of stake, large validators are exchanges and staking pools that regulators can reach.

Why did Ethereum move to proof of stake?

Ethereum moved in September 2022 to cut its energy use. It gave up open mining and the energy anchor to do it. Quai shows the other path: keep proof of work, and fix speed and scale in the protocol.

Can proof of work scale?

Yes. Quai produces a block about every 5 seconds and runs a hierarchy of chains that the same miners secure through merged mining. Capacity grows when chains are added.

Does proof of work waste energy?

Energy is what makes the money hard to create and the history hard to rewrite. On Quai the same work does several jobs: it secures the network, pays near-miss attempts through workshares, mines four other chains through SOAP, and backs Qi, a token whose supply follows the cost of energy.

Which blockchains use proof of work?

Bitcoin, Litecoin, Dogecoin, Bitcoin Cash, Monero, Kaspa, and Quai use proof of work. Quai is the one that also runs the EVM on its base layer.

Sources

This page gives information only. It is not financial advice. See the disclaimers.