The flurry of sanctions against Russia has sent investors fleeing to save havens.
Policy makers should stoke volatility to set off corrections in assets, firm strategist Zoltan Pozsar said.
Emerging markets investors have been hurt by a stronger dollar, and U.S. rate cuts might not help.
Investors have been shaken by fears of a global slowdown, Trump's trade war and the collapse of the Argentine market.
The cryptocurrency has slumped about 21 percent since Sept. 7.
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