Headline: asteroid mining is our best hope for colonizing Mars. Body text: after people start colonizing Mars, asteroid miners can sell them water. It looks l

Headline: asteroid mining is our best hope for colonizing Mars. Body text: after people start colonizing Mars, asteroid miners can sell them water. It looks like circular hope to me. Hope that asteroidal water will be useful to people on Mars. And hope that there will be people on Mars who will pay for asteroidal water.