Well thats a really clever move (sarcasm). Yepp isolate yourselves, close all the markets for your goods, strangle all political channels. See who will back you in this world as you fade.
Again I quote; US GDP $15.2 trillion, EU GDP $17.2 trillion fact. If anyone has "treasure" its us not you.
But don't worry, we wont bother with you fickle and selfish people any more. We are aligning ourselves with BRICS anyway now, they are the growing economies and the future power, along with the European block.