I know that SV seems to have abandoned the idea of good unit economics, but the concept of asteroid mining seems to take that to a whole new level. The cost of developing autonomous asteroid mining equipment, finding asteroids suitable for mining, getting this equipment to the asteroid, operating it, maintaining it, and shipping the mined product back to earth must be in the billions of dollars, if not more. This article talks about moving an asteroid into lunar orbit to make this easier, but it seems to me that the amount of delta-v needed to do that would be staggering, not to mention that even if we had engines capable of generating that amount of thrust, we would still need to somehow get them out of the Earth&#x27;s gravity well and to the asteroid in question. Plus, even if we could somehow do any of the above, is there any evidence that asteroids like the article&#x27;s $50 billion platinum asteroid even exist? As far as I am aware, less than 10% of the asteroids in the asteroid belt are metallic in nature (most are composed of carbon and silicon), and the metallic asteroids we do know about are all iron and nickel based, not exactly high-value metals. I&#x27;m all for space exploration, both by governments and by private enterprises, but this whole thing seems completely far-fetched and impractical.