TL;DR
- Ethereum developers finalized preparations for the Kiln testnet, the last dedicated testnet before The Merge
- GPU miners faced an existential countdown as proof-of-work mining approaches its end on the Ethereum network
- ETH traded at approximately $2,950, with mining profitability already squeezed by rising difficulty
- Uniswap launched a Ukraine donation interface, driving network activity and transaction fees
- The shift from proof-of-work to proof-of-stake would eliminate GPU mining revenue streams for millions of miners
March 2, 2022, marked a pivotal moment for Ethereum’s mining community as developers pushed the Kiln testnet — the final dedicated testnet before The Merge — through its final preparation stages. For the thousands of GPU miners who had built their livelihoods around Ethereum’s proof-of-work consensus, the writing was on the wall: their industry was entering its final chapter.
Ethereum traded at approximately $2,950 on March 2, stabilizing in the $2,900 to $3,000 range after a dramatic week of Russia-Ukraine conflict-driven volatility. But price action was only part of the story. The real narrative was the accelerating timeline toward The Merge — the network’s historic transition from energy-intensive proof-of-work mining to a more efficient proof-of-stake validation system.
Kiln Testnet: The Final Rehearsal
The Kiln testnet represented the culmination of years of engineering work. As the last dedicated testnet before The Merge, Kiln was designed to simulate the exact conditions under which Ethereum’s consensus mechanism would switch from proof-of-work to proof-of-stake. Developers were actively testing validator performance, transaction finality, and network stability under merged conditions.
The Ethereum Foundation also took this opportunity to officially retire the “Eth2” terminology, replacing it with “execution layer” and “consensus layer” to more accurately describe the post-Merge architecture. This rebranding effort was part of a broader communication strategy to prepare the community — including miners — for the fundamental changes ahead.
GPU Mining Economics Deteriorate
For GPU miners, March 2022 represented a bitter paradox. Ethereum’s price recovery from its February lows should have been welcome news, but the impending loss of their primary revenue stream cast a long shadow over any short-term profitability gains.
Ethereum mining difficulty had been trending upward throughout early 2022, compressing margins for operators running anything less than the most efficient GPU configurations. The average Ethereum miner using a rig of six to eight graphics cards was already seeing diminished returns compared to the peak profitability periods of 2021.
The situation was compounded by the broader GPU market dynamics. Graphics card manufacturers like NVIDIA and AMD had ramped up production during the mining boom, and the prospect of The Merge threatened to flood the secondhand market with mining GPUs, potentially crashing resale values.
Network Activity Remains Strong
Despite the uncertainty, Ethereum’s network remained highly active on March 2. The decentralized exchange Uniswap launched a dedicated “Donate to Ukraine” interface, allowing users to swap any ERC-20 token into ETH and send it directly to the Ukrainian government’s wallet in a single transaction. This development drove increased on-chain activity and transaction fees, providing a temporary boost to mining revenue.
The broader Ethereum ecosystem continued to expand, with decentralized finance protocols and NFT platforms generating consistent demand for block space. Total value locked in DeFi protocols remained above $180 billion, underlining the network’s fundamental utility regardless of its consensus mechanism.
Miners Contemplate Alternatives
With The Merge on the horizon, Ethereum miners began exploring alternative proof-of-work chains that could absorb their GPU hash rate. Coins like Ravencoin, Ergo, and Ethereum Classic were frequently discussed in mining communities as potential destinations. However, none of these networks offered the revenue potential that Ethereum provided, creating a difficult transition for miners heavily invested in GPU hardware.
Some mining operations began pivoting toward other revenue models, including high-performance computing, AI training workloads, and cloud rendering services — applications that could repurpose existing GPU infrastructure for non-cryptocurrency use cases.
The Staking Transition
As miners prepared to exit, the staking ecosystem was flourishing. Over 10 million ETH had already been deposited into the Beacon Chain, Ethereum’s proof-of-stake consensus layer, by early March 2022. Staking providers like Lido, Rocket Pool, and Coinbase offered liquid staking solutions that allowed ETH holders to earn yields without running their own validator infrastructure.
The contrast between the two ecosystems was stark: while miners faced an uncertain future, staking operators were positioning themselves for a massive expansion of their services once The Merge activated.
Why This Matters
The events surrounding Ethereum on March 2, 2022, represented one of the most significant transitions in the history of cryptocurrency mining. The shift from proof-of-work to proof-of-stake promised to reduce Ethereum’s energy consumption by over 99%, addressing one of the most persistent criticisms of cryptocurrency mining. However, the transition also displaced an entire industry of GPU miners, forcing a reallocation of billions of dollars in hardware investments. For the broader crypto ecosystem, The Merge represented a critical test of whether a major blockchain could fundamentally change its consensus mechanism without disrupting its operations — a technical feat with implications far beyond Ethereum itself.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Cryptocurrency markets are highly volatile. Always conduct your own research before making investment decisions.
had 12 GPUs mining eth when kiln launched. knew the end was coming but watching it happen in real time still hurt
the uniswap ukraine donation interface spiking fees was just salt in the wound for miners watching their revenue stream evaporate
pos_convert the uniswap ukraine interface was a genuine use case though. fee spike from donation volume was temporary but it showed eth could mobilize capital for emergencies faster than tradfi
rig_orphan 12 GPUs mining ETH watching the end come in real time. the emotional attachment to hardware that generated income for years is real
rig_orphan watching kiln launch knowing your 12 GPUs were about to become paperweights. the merge was necessary but the human cost was real
gpu_eulogy_ the emotional attachment was real. my 8 GPU rig paid for my car and a vacation in 2021. watching kiln launch felt like attending a funeral for a friend who was also your landlord
gpu miners flooding to ravencoin and flux after the merge announcement. none of those networks could absorb the hashrate though
Minh Tran ravencoin and flux couldnt absorb the hashrate because the economics never supported it. the GPU mining era ended with the merge
Minh Tran ravencoin and flux couldnt absorb the hashrate because their economics never supported it. GPU mining ended with the merge for most people