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I read things about Ant Pool and Friends and Foundry getting seven blocks in a row. How big a problem is miner centralization in Bitcoin? Are we at red alert stage yet or just it's a concern but not something to lose sleep over?

HUGE problem. They are too big and the network is exposed. As long as they are good actors nothing bad happens but the revolt should come before it does. A selfish mining attack is already possible. (Maybe happened)

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Do you think there is much individuals can do about this? for instance does home mining make a dent in miner centralization?

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Individual mining is good but it takes a lot of people collectively to make a difference. And, they must really mine - not point to an FPPS pool. That said, don't feed the mouths of the big pubcos and rally against them or at least force them socially to do the right thing.

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the trend towards miner centralization does seem worrisome. what gives you hope on this front?

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The pubcos have been a huge driver (and negative influence on Bitcoin and mining). They are leaving/shrinking. A lot pivots from this including the Foundry/Antpool domination.

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