oracle2014

If its a hobby no. I am sure you will be fine. as long as its not your main income. I once made 20k on BTC, withdrew to bank, didn't say a thing. But this is UK, I guess it depends what country your in and how close…

Depends how much you earn and how you use it.... if its a hobby it doesn't have to be declared, if your earning BTC for a living like 50+ a month and withdrawing to your bank, then maybe you do have to do declare.