3,628 karma · joined January 21, 2009
Now, if the currency was based on a commodity that has no value, then maybe your argument makes some sense, but precious metals were chosen specifically because they are valued irrespective of their role in currency. Besides, if an enormous amount of gold was discovered, sovereigns and governments still had control of the currency through debasement.
For direction (left vs right), I would broadcast a "beam", increasing in strength on one side, so hopefully an intelligent enough civilization could measure that from "left" to "right" the beam got stronger, perhaps again using pitch to help guide. The problem then would be conveying whether they should follow the broadcast "left to right" or the received "left to right" (i.e. imagine someone holding up their left hand, do they mean your left hand, as in match them, or your right hand, as in mirror them).
Incidentally, there was a cool iPhone app called TubeMap that made travelling on the tube a breeze when I was there last which included service downtimes which are apparently quite common, worked fine offline and was pretty fully featured in all ways you could want. However, the Tube is only a small part of the public transport for greater London.
Consider it from the perspective of a loan - if someone you don't know well asked you for a loan, and said it was secured against "cult-booblahs" and that they were meeting with another member who traded in "cult-booblahs" this afternoon to sort it all out, it probably isn't going to go too well. From security's perspective, they are going to be immediately thinking one of: some weird drug lingo/money laundering situation, some weird pyramid scheme, or some cultist or anarchist dealing in imaginary currency. You've just made a simple question far more difficult than it needs to be.
It kind of raises the questions - why would someone with only $600 cash in the world be entering a rather expensive country for two months? From security's point of view, why would someone with only $600 cash have thrice that or more invested in some weird investment scheme? Finally, how does the founder of a bitcoin exchange have so little liquid assets/accessible emergency credit?
As an FYI, the author mentions they're from the UK or Ireland, and we were asked the same questions in both places (ensuring you have enough funds to support yourself) upon entry so this isn't US specific. Bringing enough cash to support yourself is expected (you could have said you are collecting a $10,000 loan rather than bitcoin and you probably would have still been refused - visitors should be able to demonstrate they can support themselves for their trip without relying on some deal going through once they're in the country).
I hope travel insurance covered the cost of the unfortunate trip.