Crypto currencies have suffered a Flash Crash, wiping-out upwards of $500 BILLION of value in about one hour today. It is likely tied to China's announcement of aggressive Export Restrictions on nearly everything they export, including rare earth minerals they refine for OTHER owners!
Look:

and these:

Word is that once word of China's move got out to the uber-wealthy, the "whales" immediately pulled out of crypto and are heading into Precious metals which are a known safe haven in economic turbulence.
Folks familiar with crypto currency markets are describing today's moves by saying "it's a slaughter."
