Banking crash ahead

The inevitable raise of interest rates even by the admission of Obama's stooge Janet Yellen and supported by the dollar manipulation in Treasury, is forcing Bank of Russia to stop purchase of foreign currency in order to stem the falling ruble, with reserves down to $300 billion. Bank of Saudi Arabia is also burning currency reserves as fire, and many OPEC sovereign funds are nearly depleted. Yet the Federal Reserve stated recently that they can expand the balance sheet to infinity, meaning that they can print all the money they need to prevent crash in the US. But what if the crash comes from outside? What then? What if all Chinese companies delivering stuff to Walmart go bankrupt?