what does dr burry mean by his btc mining tweet today
   [1](20) Cassandra on Twitter: "70% of $BTC is mined in sanctioned
   countries, China, Iran, Russia. Crypto is in a race - add enough
   reputable agents of commerce to counter and overcome the inevitable
   coordinated actions of the ECB/BoJ/Fed/IMF/WorldBank-level
   powers-that-be to crush it. https://t.co/glYdmeTJ4g." / Twitter
   70% of [2]$BTC is mined in sanctioned countries, China, Iran, Russia.
   Crypto is in a race - add enough reputable agents of commerce to
   counter and overcome the inevitable coordinated actions of the
   ECB/BoJ/Fed/IMF/WorldBank-level powers-that-be to crush it.

References

   1. https://twitter.com/michaeljburry/status/1359943872869113859
   2. https://twitter.com/search?q=$BTC&src=cashtag_click