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Can you use stocks to trade with others worldwide in realtime with a super low fee and full control over the payment process?

Bitcoin still is a lot more than just that

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Traditionally you just use money to do that.

You don't. It's illegal to travel with more than $X over boarder Y. Embargos and different banking systems and culture make 'bank transfers' inaccessible to a majority of people in this world.

The only alternatives are western union and other private companies with 10+% fees or hidden private banking networks like 'Hawala'.

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