The main reason that occurs is due to a lack of public awareness coupled with lack of safeguards and accountability. I'll contend: with a smaller and better informed population it becomes less feasible & less likely.
Maybe. But if history is any guide, the power to print money will always be abused to the benefit of those who print. I don't see human nature changing any time soon, so taking the power to print money out of the hands of people is the only logical course of action. That's what this "Bitcoin" thing is all about: verify that your money is legitimate without trusting a third party.
Have you read
The Bitcoin Standard yet? It lays out the economic foundation for this whole endeavor, and I highly recommend it.
The Humanity will never leave this palnet,so such articles are just fantasies and science fiction dreams.
It would be safer and cheaper,if we send robots to populate other planets,but the robots won't create markets and trade,so it's pointless to talk about any form of currency.
What's with all the negative trolls in this thread?