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Schwarzman says he doesnt get why anyone would want or need a currency thats not controlled by governments and banks, and hes concerned about Bitcoins use among criminals.
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Just ask the people of Venezuela, Cyprus, China, Hong Kong, Zimbabwe, Sudan, Turkey, Iran and Argentina recently and Cuba, North Korea, Germany, etc in the past if you want to understand why one might want to have a currency not controlled by governments and banks. Plus transportable across borders.