[tabsa]

Totally agree with you on possibility of governmental attacks on bitcoin, thats why i added the war on drugs analogy, and it doesn't quite matter what political moral high ground excuse will be used to attack bitcoin, be it terrorism or money laundering. That's not the point.

My point is that Bitcoin has backing that is even more powerful than men with guns or physical assets. That backing is subjective value of Bitcoin in people's minds. Think Apple or Luis vutton, it's valuable because people think it is, and if the ideas on which Bitcoin is based are a solid foundation, the value of Bitcoins will only grow.

So for your third option of backing i'm thinking in terms of http://en.wikipedia.org/wiki/Subjective_theory_of_value the "men with guns", or "gold in storage" has the same value as "men who combined great ideas(PGP P2P Crypto Currency) and produced value (Bitcoin)".