A nice example is that Softbank (with a Mcap of 90Bn) once owned 26% of Alibaba, which now has suffered greater than a 50% drop from its highs. Softbank had a large (dollar) margin loan based on Alibaba shares as collateral.
As credit risk rises, the quality of collateral in the debt market will be called into question, which is why the dollar will have increasing demand as debt bubbles pop around the world.