@zzz2 thank you for your response / questions
(a) on how to prove that the asset came to you as gift --- I don't know exactly how ownership is determined / transferred for crypto --- if it is just account sign-in type then perhaps you need a document signed and "notarized" ( i.e. some form of authentication of the signature of the donor ) transferring the ownership. I have no personal experience in this crypto world.
(b) on accepting gifts from a citizen of Russia --- I have to read up on treasury rules but I suspect / expect that unless the donor is a sanctioned person, it may be no issue. But I need to research this topic but it is indeed an interesting issue.
pk
