Why do proof of work systems ramp up the difficulty of hash solving while keeping latency constant, instead of keeping difficulty constant while nodes compete to reduce latency? The later seems more useful, and not inflationary.
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How there is nothing? you are constantly incentivized to be honest, otherwise this whole thing would be pointless and unprofitable in the long run... PoW is what prevents the double spending.
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PoW does not prevent double spending. Any miner can put as many double-spend transactions into their blocks as they want using PoW. It is only the validation on the other nodes that prevents this. PoW is _just_ DDoS prevention, nothing more.
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