As I said, just make sure that all your taxes are in order because if they can fine you for not paying the correct amount they will
They won't if you apply at least small effort to hide your Bitcoin income. Vast majority of people in the world don't live in countries with fair and transparent governments like Scandinavia. I think nobody wants to buy another yacht or jet for the corrupt politician! 
You might be able to hide your income fairly well but good luck trying to explain where you got all the money from to fund your own lavish lifestyle when you're clearly living well beyond your means. It's no good having a load of money just hidden when you can't even spend it but if you try to buy a house or start buying yachts for yourself etc you'll soon catch the eyes of the law and you'll have a lot of explaining to do when they ask you how you can afford all this nice stuff. Bottom line is if your country requires you to pay taxes then you should. If people don't like them then there are plenty of countries that have no taxes or very little that you can emigrate to. I don't think the threat of prison, fines or criminal records is worth the hassle personally and I don't mind paying reasonable - reasonable being the keyword here - taxes as long as they're spent on benefiting society and not wasted on needless wars and bailing out corrupt banks when they fuck up after gambling with other people's money.