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As far as I understand, governments & banks create money into existence. Governments, when run correctly, use it to build infrastructure, give grants and create jobs.

What if everybody begins to use a cryptocurrency therefore nullifying the value of the governments currency?

  • How will governments spend when nobody wants their money?
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Government's tax citizens and businesses in their currency. Earnings (even earnings in cryptocurrencies) are taxable income.

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    This doesn't even begin to answer the question. It's a complete non-sequitr. – Harper - Reinstate Monica Dec 17 '17 at 3:52

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