well, it depends on how your country reacts on bitcoin, if its illegal in your country maybe it can be called as crime but I think there were already laws that prohibit the use of bitcoin.. But it doesnt mean that you can compare the bitcoin with the use of gun.. they were on different aspects. Bitcoin can make our lives better..guns can make our lives miserable.
I guess if our country doesn't allow bitcoin as a legal thing, we still use bitcoin by secretly because we know that bitcoin can give us another way to make money which we really need. but I don't think that to own bitcoin is a crime because people have the right to do with his money and maybe he only wants to buy bitcoin and then he wants to save it in his wallet and not use for another thing. and maybe our country doesn't give any statement about bitcoin so we can use it for free.