Ethereum is the world's leading smart contract platform, and its native cryptocurrency, Ether, is the second-largest digital asset by market capitalization. However, since the completion of "The Merge" upgrade in September 2022, Ethereum's mining method has undergone a fundamental transformation, shifting from energy-intensive Proof of Work to a Proof of Stake mechanism.
Ethereum Mining: A Historical Shift from PoW to PoS
Before September 15, 2022, Ethereum, similar to Bitcoin, utilized the Proof of Work consensus mechanism. Miners used computing devices like graphics cards to solve complex mathematical puzzles, competing for the right to bundle new blocks and, in return, receiving newly minted ETH as a reward. This process was known as "mining."
However, PoW mining faced significant criticism due to its high electricity consumption. To address this issue and pave the way for future scalability upgrades, the Ethereum community planned and executed "The Merge." This was a technical hard fork that combined the original execution layer with the new Proof of Stake consensus layer—the Beacon Chain.
"Mining" under Proof of Stake: Staking
After The Merge, traditional PoW mining on the Ethereum mainnet permanently ceased. It was replaced by the Proof of Stake mechanism. Under this new system:
- Validators Replace Miners: Network security is maintained by "validators" instead of miners.
- Staking Becomes Core: To become a validator, one must stake at least 32 ETH. This staked ETH serves as collateral to ensure validators act honestly.
- Reward Mechanism Changes: Validators earn rewards by proposing and validating new blocks, with rewards sourced from network transaction fees and newly issued ETH. The reward rate is related to the total amount staked, not computing power.
- Withdrawals Become Possible: Following the "Shanghai" upgrade in April 2023, stakers can unstake and withdraw their ETH and rewards.
This transition is estimated to have reduced Ethereum's energy consumption by over 99.5%.
The Evolution of Ether's Function and Role
Ether's functions have been further solidified and expanded with the shift in the consensus mechanism:
- Network Fuel: Pays for transaction fees, or "Gas fees," which are necessary for any operation on Ethereum (e.g., transfers, running smart contracts).
- Staking Asset: Serves as the core collateral under the PoS consensus mechanism, fundamental for maintaining network security.
- Store of Value and Medium of Exchange: Acts as the primary unit of account, transaction, and settlement in ecosystem applications such as Decentralized Finance and Non-Fungible Tokens.
Ether's supply has no hard cap, and its issuance rate has become predictable under the PoS mechanism, dynamically related to the total amount staked.
Key Upgrades and Developments Post-Merge
The Merge laid the groundwork for subsequent upgrades. One of the most significant advancements was the "Cancun-Deneb" upgrade implemented in March 2024. This upgrade introduced EIP-4844, which significantly reduced transaction costs for Layer 2 scaling solutions through a new transaction type called "blobs," thereby enhancing the scalability and user experience of the entire Ethereum network.
Market and Ecosystem Status
As of October 2026, the price of Ether is approximately $2454, with its market capitalization remaining around $286 billion, firmly holding its position as the second-largest cryptocurrency. Its vast developer community and active ecosystem applications, including DeFi, NFTs, gaming, and numerous enterprise alliances, continue to solidify its status as a core blockchain infrastructure.
Ethereum's transition from PoW to PoS was a successful paradigm shift that not only addressed energy consumption issues but also opened up new possibilities for the network's continuous evolution. For users, participation in the network has shifted from "mining" to "staking," while Ether's importance as a core ecosystem asset has only grown.
