I think he runs out of money for building a wall and he just found a way to get money from something else like this ban.
How exactly can USA become money from banning a Currency?
Venezuela hasz a corrupt government and for beeing leade by an dictator like Mr Maduro there are trading embargos against venezuela. Of course with an ICO venezuela found a way to become fresh money into the country. Everybody was knowing before, that the governments from the western world couldnt allow this cryptocurrency.
Its not wise and ethical not right to support a corrupt dictator, so stop crying if you loose your blood money