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"crypto and stablecoins will destroy them sooner or later."

LOL!

I meant digital dollar and digital euro, you won't need Visa and Mastercard anymore.

Dollar is already "digital", and has been for the last 50 years or so.

I meant this https://www.federalreserve.gov/central-bank-digital-currency..., this https://en.wikipedia.org/wiki/Digital_euro and this https://en.wikipedia.org/wiki/Digital_renminbi

It's just buzzwordy bullshit. The European system is just a classic credit/debit system. The Chinese system is a bit more sophisticated, with offline capability and smart contracts.

But it doesn't use any distributed proof-of-work/stake stuff.

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