If you do it all by yourself then your assets might get frozen if not comply with gov regulations, though you can as long as you get cash in person and not by paypal or other services.
as still no one country give clear statement about bitcoin that either it is legal or illegal currency, therefore you can normally use it for being undefined status but if you are going to open a shop just for the purpose to do exchange of bitcoin it may be a problem as you have to give a statement about you r business which you are going to run in a shop but as bitcoin is not a legal business therefore they will not allow you for but i i think you can do it as mobile shop having no need to register with government and to take NOC from government.