How to LEGALLY pay no taxes doing your business and non-commercial projects? Cryptocurrencies are not sufficiently good by themselves, because legally you may have problems in many countries in case somebody finds out you have a capital of this kind paying no taxes. You have a risk. It is possible to hide things, but it would be more reliable to have a way to pay no taxes fully openly and legally, hiding nothing.
Also, I do not mean ways reducing taxes. The ideal result is 0 taxes and no relations with tax authorities.
Also, I do not mean not being pro-social! But when you start or do a project that will be of a great benefit to all humanity, paying taxes may be unethical toward sponsors and other people: they give money not to your state but to you, so that you can implement your idea.
It may be good to pay taxes, when you have no better ways to help humanity or your country except giving out the money to people who know better. But when you know for sure, you will be more efficient in doing good for this money, it is unethical and unefficient in term of public good to give out these money to governments.