I don't know about everyone else, but something that really interests me is the future of cryptocurrency in space. Imagine being able to make secure payments to the furthest reaches of our solar system, utilizing satellite nodes orbiting every planet.

We'll be able to extract rare resources, and send them back to earth. Seamlessly exchanging them for Digital currency, which workers on other planets can either save or spend. They would likely purchase goods collectively, to save money on shipping and handling. Right now it takes 130 days for a high speed transport vessel to reach Mars, but the time will obviously decrease as our technology improves; Making a solar system wide economy completely possible.

I know this sounds like something out of a science fiction movie, but it isn't as far off as you may think...

https://www.cryptocoinsnews.com/bitcoins-space-bitsat-protect-bitcoins-future-orbit/