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PoW is how bitcoin blocks are “sealed” forever, which makes bitcoin possible, how is that not useful?

• solotronics 9y ago
  each mined block is like a digital pyramid of Giza made of a massive number of computations sealing the transactions into a mathematical tomb. really neat.
  • Dylan16807 9y ago
    And just like that, there are much less costly ways to seal something than mass manual labor.
    • rrobukef 9y ago
      But none as impressive as the seven world wonders.