this post was submitted on 15 Apr 2025
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The lack of successful 67% attacks on major PoS chains is indeed a positive sign. However, this could also reflect social deterrence, early-stage economics, or insufficient adversarial incentives — not necessarily intrinsic robustness.
Anyway my initial argument was that Bitcoin have no interest to move away from its PoW and especially not to transition to PoS. PoW isn't perfect and has its drawbacks but PoS is not a better system, it's an alternative with other drawbacks that doesn't meet every chains needs.
True, I agree that PoS has tradeoffs and isn't a perfect solution. And I totally understand that Bitcoin has lots of reasons to stick with PoW. I was speaking more generally about resilience and security in PoW vs. PoS.
I don’t think what happened to Ethereum is a fair comparison, because PoW doesn’t have finality to begin with. When Ethereum temporarily lost finality, it just reverted to a PoW-like model, where finality is probabilistic. It was a degradation, not a catastrophic failure.