Bitcoin mining has been happening all on custom hardware for a long time now.

bdcravens · on Jan 7, 2021

Yes, but the altcoins that are GPU-mineable are easily converted to BTC, and the price trends tend to correlate with BTC's.

twox2 · on Jan 7, 2021

What are some gpu mineable alts that are profitable?

bitcharmer · on Jan 7, 2021

Ethereum?

imtringued · on Jan 7, 2021

If you can get cheap electricity you can probably mine anything GPU based.

pixelpoet · on Jan 7, 2021

And somehow proof of stake always remains fully outside of the discussion: https://en.wikipedia.org/wiki/Proof_of_stake

tl;dr More forward-looking coins, like Ethereum, will get rid of the energy intensive mining via a completely different consensus mechanism.