If that happens i think that was too dumb and foolish. What is the reason for making Bitcoin illegal if it does not steal , scam or take on someone. Investing is not a crime. Also i think just make them learn about Bitcoin , Crypto currency and digital currency so that they will understand that there is nothing wrong in Bitcoin , crypto currency and digital currency. But if the government really treat the holding Bitcoin is illegal then there is really nothing you can do but to accept that they can not understand it.