Whatever his/her actual reason, Bitcoin is actually more valuable in regions where it is "illegal" to use Bitcoin because it makes use of its main value-proposition. CENSORSHIP-RESISTANCE.
But it's probably a good decision NEVER to tell anyone in real life that he/she uses Bitcoin. Although online, and anonymously - he/she should tell everyone.
If someone lives in China, Iran, or in some region where the government is sort of too restrictive, they can say "I AM FRIM IRAN AND I USE BITCOIN TO GAMBLE, BUY ALCOHOL AND DRUGS. TRY TO STOP ME".
Telling someone about Bitcoin is not a bad thing, it's a welcome idea for Bitcoin to spread to those that have no idea of it, but where the challenge is, is that you are exposing yourself to be robbed, because in my locality, they sees anyone that invest in Bitcoin as a wealthy person, most folks in the streets believes that you can't invest in Bitcoin if you are poor, so preaching Bitcoin to every random person you see is a very stupid way to expose yourself, because you might be robbed. So if you want to be telling people about Bitcoin, use your discretion to analyze a person first before revealing things to that person that you invested in Bitcoin and give him a reason why he should do so, because a locality like mine, if you exposed yourself easily to the wrong person, you will surely regret in no distance time.
And you know why it's like that? The economy of our country is not smiling at we the citizens, so most people will do anything, even though it's criminal, just to survive.
Yes it is not wrong but for our safety sake it, we should keep our mouth shut, I know sometimes people can be over excited or carried away by virtual of the progress they are making or they have make and so they can run their mouth anyhow not knowing the people around and the possible consequence. I was among the people that sees anyone who invest in Bitcoin as wealthy people but as time goes on I realized it was not true because anyone can invest in Bitcoin.
No matter the economy of a place, it is not enough reason for someone to steal or do crazy shit because there are people in that same economy and same country that are doing well.