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How could they even tax the other countries though? They have different laws.

They will treat this the same way they treat stock trading platforms like Scottrade. US clients on foreign exchanges will need to declare their holdings and activity. There was a crack down on US foreign bank accounts in Switzerland a few years ago. Expect the same with cryptos.

While this will take a bite about of active traders' profits, it should help reduce the erratic price changes due to day traders.

It might not be the worst thing in the world.

It will turn off people from buying them and sadly most cryptos will not last.

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