⟠ Ethereum 2.0 Eth2
The umbrella nickname for the upgrades that moved Ethereum from mining (proof-of-work) to staking (proof-of-stake). It is the same network and the same ETH — not a new coin.
🌱 The simple version — Ethereum traded mining for staking
Ethereum used to run on proof-of-work: thousands of machines burned electricity racing to win each block, the same way Bitcoin still does. "Ethereum 2.0" is the nickname for the plan that swapped that out for proof-of-stake. Instead of miners, the network is now kept honest by validators who lock up (stake) ETH. Behave well and you earn rewards. Cheat and part of your stake is taken away.
🔗 "The Merge" — the moment it actually happened
The headline event was The Merge on September 15, 2022. A separate proof-of-stake chain called the Beacon Chain had been running quietly since 2020. The Merge joined it with Ethereum's main chain so they became one network, flipping Ethereum from mining to staking overnight. Nobody had to move funds or swap tokens — the same ETH kept working.
🏭 Factory vs. security deposit
Think of proof-of-work as a noisy factory floor where machines race to win the right to record the next page of the ledger — whoever spends the most power tends to win. Proof-of-stake replaces that race with a deposit: you put down staked ETH for the right to do the bookkeeping, and you lose part of it if you cheat. Same goal (keep the records honest), far less electricity.
🌍 Why people call it the "green" upgrade
| Before (mining) | After (staking) |
|---|---|
| ⛏️ Machines race using huge amounts of power | 🔒 Validators stake ETH instead of burning power |
| 🔥 Very high energy use | 🌱 Roughly 99.95% less energy after The Merge |
| 🏭 Rewards for the biggest hardware | 🎁 Rewards for honest validators |
📉 That ~99.95% drop means proof-of-stake is on the order of 2,000x more energy-efficient. It is the main reason Ethereum is now described as "green."
🗺️ The upgrades didn't stop at The Merge
Ethereum's roadmap kept going. A few names you may run into:
- 🔓 Shapella (Apr 2023) — finally let people withdraw their staked ETH
- 🧱 Dencun (Mar 2024) — added "blobs" to cut fees on Layer-2 networks
- ⚙️ Pectra (May 2025) — smoother accounts and staking tweaks
- 📡 Fusaka (late 2025) — more room for Layer-2 data; Glamsterdam is next
The bigger picture is that the roadmap is now "rollup-centric": the main Ethereum chain focuses on secure settlement and storing data, while most everyday activity moves to faster, cheaper rollups built on top.
❓ FAQ
- Is Ethereum 2.0 a new coin I need to buy or swap into?
- No. It is the same Ethereum and the same ETH — there is no new coin and no swap. The upgrades changed how the network runs under the hood, not the token in your wallet.
- What was 'The Merge'?
- The Merge, on September 15, 2022, joined the original Ethereum mainnet with the proof-of-stake Beacon Chain into one chain. That switched Ethereum from mining to staking and cut its energy use by about 99.95%.
- Why do people say to stop using the name 'Ethereum 2.0'?
- The Ethereum Foundation retired the 'Eth2' label because it made people think there were two Ethereums. Today there is just one Ethereum. We keep the term on this page only because many beginners still search for it.