Unfortunately your remark makes me think that it is the people who have the most money who also want to avoid taxes the most. It's really too bad, what's the point of having so much money ? In fact, I was thinking above all of the average citizen who could be accused of money laundering when he is innocent. Otherwise yes thank you for the answers which advises a tax lawyer, it is obvious, I had not even thought of it.
You know, imagine a scenario where you actually find 10 BTC in an old wallet, you sell it, and you want to buy a dream house for your family with it, but... you step into a higher tax bracket and the government takes 60% of it...
so you put it in your bank account and decide that you will earn the rest in 10-15 years and buy your dream house than ... nothing further from the truth, because during these 15 years 80% of what is left will be eaten up by inflation ...
I see it as stealing... but when proposing a tax advisor and a lawyer, I did not mean only reduce taxation, I also meant countries where, due to the lack of clear regulations, it is actually difficult to withdraw a larger sum without being left to the individual interpretation of a jealous official.
As for the purpose of having lots of money by avoiding too much taxation, I'll tell you that I'd rather pay less tax and put the surplus into local soup kitchens for the poor or charity for sick children than to line the pockets of corrupt politicians.