How much longer will Ethereum be mineable?

Ethereum is implementing an upgrade called Arrow Glacier. This will delay to June 2022 the onset of a “difficulty bomb” that could halt mining of the Ether (ETH) token. Ethereum is shifting from a proof of work to a proof of stake model. Ethereum 2.0, or ETH2, is not a new cryptocurrency, but that new model.9 Ara 2021

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What is difficulty in mining?

Mining difficulty is a measurement unit used in the process of Bitcoin mining. Difficulty indicates how difficult it is to solve a complex cryptographic puzzle. The difficulty of mining new units increases or decreases over time, depending on the number of miners in the network.

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