If you have a proper license for it you can really do it..
It totally based on your country policies and rules.
Some countries are banned bitcoins and some countries accept it and trading it to. In some countries do not know about bitcoins or any other cryptos and its value.. When it become legal for all countries then you will get more profit...
Very much it is depended upon which country you live in and what are the rules and regulations of that country regarding this policy. Some country may not encourage the cash activities and as a result somebody may face the action.
Also I doubt that all countries will accept btc. I think limited countries may accept it and rest may ban or will introduce their own coin.