There are countries that have imposed taxes which means they haven't banned the crypto but there are countries like mine that have banned the crypto so it means they didn't impose any taxes on it as they have banned it legally. But people are still into crypto and not paying taxes. My opinion in this for the country is they should make crypto legal and put some tax. That way it will be helpful for them as well.

And talking about your question, I also had the same one for a long time, but I assume in that case you have to trust other party living in another country where taxes are low or no taxes, with your money. Even if the other person is your relative or your brother, the availability of funds won't be at same level that they will be if in your possession.

I am not a legal advisor so I only shared my opinion not a legal advise thanks.