The answer is highly dependent on the amount:
- if the amount is rather small, then you can go for almost anything, nobody will run after you for tax;
- if the amount is decent, then you can go for physical meetings for cash;
-  if the amount is important, then you can establish a company and hire a good accountant, pay the tax and find some cost for optimization;
- if the amount if ginormous, then... move to a country that doesn't charge tax on bitcoin...