This stage will begin the migration to Proof of Stake - PoS and the process of leaving Proof of Work - PoW mining behind. However, there are certain things that can go wrong and make the network vulnerable.
Ethereum is almost ready for the arrival of the merger - The Merge, according to official information.
The merger which could last for several months will coexist in Ethereum PoW mining and staking.
Miners will be able to continue running their rigs and will receive rewards for this work.
Ignorance about this situation could lead many to turn off their mining equipment or migrate to other networks. They could also sell them, in order to make a higher profit than they would be mining those last few Ethereum rewards.
The developers expect that PoW mining will be phased out as the final date of the merger approaches.
A massive reduction could lead to the network being vulnerable to some kind of 51% attack, where a malicious entity takes over most of the mining power.
They would be avoiding sharing the information about the arrival of the merger
An emergency plan to carry out the merger in a forced way, in case of an extreme drop in hashrate.
Ethereum 2.0 staking—which is already running—switches to validating transactions instead of the hashrate being reduced.
High probability of hard forks in Ethereum
Kharif also refers to the high probability of forks in Ethereum before or during the merger.
A new Ethereum would be formed, possibly ending up being considered a new cryptocurrency.
Centralized or decentralized platforms prevent any type of deposit or withdrawal of ETH or tokens
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