Here in India, the Income Tax department has started their latest round of harassment against Bitcoin users. Legal notices have been sent to some 600,000 people, who are suspected of trading in Bitcoins. Some officials are saying that anyone found to be trading in crypto will be charged with trying to destabilize the Indian economy.
Use VPN, don't use Indian exchanges and don't withdraw fiat on local bank account. Preferably, trade via Localbitcoins.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! 
that's terrible question actually 
we don't have a choice to pay or not - we all must do so 
You always have a choice, even more than just between paying or evading taxes. Unfortunately, many people still treat govt like God and cannot imagine they have moral right to choose a new one. we don't have a choice to pay or not - we all must do so By law you can have RESIDENCE (which is different from citizenship) only in ONE country. So, that's where you pay your tax.
I know some countries (e.g. USA) collect taxes regardless of residence.