lol dude, chill, Russia can bomb whoever they want, you can even load your Su25 full of Russian coin as they worth absolutely nothing now. Its cheaper than using bomb.
Seriously the reason you cannot use gold is simply because you can say your 1 ounce of gold is worth 500 ton of grain. The only thing i need to do is to reject it, then your gold would not worth anything in my eyes
Unless Russian can eat gold and silver to survive, well, you would be better off using pig as currency as, well, at least you can eat them