The OP's point was about morality, and it is as immoral as cheating in any system. Whether it's a crime is entirely different. Crime necessitates a judicial sys

The OP's point was about morality, and it is as immoral as cheating in any system. Whether it's a crime is entirely different. Crime necessitates a judicial system, and the whole framework of crypto currencies has be outside the purview of any government or judicial systems. So the word crime itself doesn't mean anything in this context. Secondly, your argument relies heavily on the gravity of this act, which is entirely derived from the implied value of the coin. In isolation, this is no different from someone cheating in a computer game. Note that you cannot make the computer game analogy with other markets and banking systems easily because of dependence on other inputs. This, in contrast, is completely isolated from the rest of the world. As such, the guy may not do anything with the coins, and they would cease to exist (in their universe much like how they came into being). Would your argument still hold ? The fact that people have created a secondary market out of the coins, which came into existence out of thin air in the first place, doesn't automatically determine the criminality of the act.