They'll do that if we refuse to give them Alaska.
Many of our citizens will go naked and starve before we can rebuild our capacity for production.
In addition, their "pictures on paper" will be as worthless as those of foreigners. Those who treat this as some sort of clever con that foreigners are falling for never address what will happen after the con. We will destroy the credit and financial credibility of the United States and the dollar will likely be replaced as the primary world currency. That will be quite a legacy for us to leave the next generation.