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I wonder if there needs to be a single reserve currency any more.

In the past it made things easier for everybody to use the same currency, but is that still the case with modern electronic transactions?

Maybe it splinters into Euro, BRICS, and USD?

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It's easier if contracts run on the same currency I think, your suppliers price in USD, you sell your products in USD, it's easier for a whole supply chain that way. I can imagine that fracturing or switching to Euro for things like manufacturing and semiconductors.

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