Yes we may be seeing the opening of a trade war. In my opinion as civilians it's wise we stay out of that. The people who get involved in that are likely to be put on the lists of multiple governments. Why? Because if you're helping some competitor of a government then the government has reason to watch you.

In the case of the Petro, the government behind it is obvious. It doesn't benefit the people of the world. It's not even a real cryptocurrency.