Thanks for the comment. A couple of words about "value". Value is a concept. It does not exist in reality like matter or energy. This concept applies to volunt

Thanks for the comment. A couple of words about "value". Value is a concept. It does not exist in reality like matter or energy. This concept applies to voluntary actions. It does not apply to involuntary actions. If a judge and a policeman force you to accept USD as a method of paying you, it says nothing about how USD is valuable for you. We can only observe that you value your life more than non-complience. So "legal tender" laws do not create any kind of value at all. I would argue that, probably, the opposite is true: when something must be enforced, it is because of its negative utility. In the peaceful situation, however, we may discuss different kinds of values. Certain things can be valuable for your own immediate needs, without much participation from other people. E.g. your pen is useful without need for cooperation with others. You may say the pen has "direct" use value. Dollar bills are almost only valuable when you can trade them for something with others. Of course, you can do paper planes or use them for cocaine sniffing, but that happens comparatively rarely. Bitcoin block chain allows not only money exchange (which requires somebody to exchange with you), but also some bookkeeping for yourself, or your friends, or future generations.