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Ethereum switching to PoS seems like it would definitely reduce the incentive to buy truckloads of gpus

Wouldn't the hundreds of other PoW currencies still be an incentive?

Most GPUs are used to mine ETH. It is by far the most profitable. Unless another POW coin becomes as valuable as ETH, demand for GPUs will drop precipitously.

[deleted]

BTC hasn't used GPUs to mine in 8+ years man.

bitcoin doesnt use GPUs

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