Remember, the mining difficulty will automatically adjust downward as miners exit. Also, people won't need next gen hardware if there is a precipitous drop in BTC price...current gen hardware and fire-sale used mining hardware (from people exiting the market) will work fine
RE: Bitcoin mining will exist only if the Bitcoin price goes up!
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Bitcoin mining will exist only if the Bitcoin price goes up!
Please look at the formula which define difficulty. Mathematical task which miners needs to solve in order to be rewarded doesn't relate to the number of miners. On the other hand check this https://en.bitcoin.it/wiki/Target
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The BTC difficulty setting (aka target) applied to the BTC SHA256 hashing function depends on the network hashrate, which depends on the number of miners. If miners leave the mining business, the network hashrate drops and the BTC software self adjusts the difficulty target to ensure that blocks are solved on average every 10 minutes.
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Blockchain will not exist correcty withour miners(or 'transaction processors'). Although It seems to be possible. Instread of proof of work there is a chance of using Proof of Stake as an alternative. In that case, we don't need 'miners' to solve a cryptographic tasks. The main tasks for Miners is to check if all is good with Blockchain. I know that we have "audiotors" as well but Miners are mainly important because their purpose is to: provide a decentralized mechanism for determining which version of history to accept
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