I believe that your being down-voted for writing:<p>&gt; But it&#x27;s a stupid, wrong solution. The basic idea sucks. It&#x27;s bad.<p>instead of explaining that the cost is the cost of guaranteeing the authenticity of the transaction. HackerNews likes technical comments, and will happily burry expletives.<p>You could find more compelling example, such as estimate the ecological cost of having most of the current world-wide banking transactions on BitCoin, and prove your point.