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The issue you are talking about wasn't VISA fault.
WaveCrest is the third party connecting VISA to the different cards, and was the entity that suspend their activity.
FuzeX is much more than a cryptocurrency expandable card, and to answer your question, they didn't announce yet how that part of the card will work yet.
Quote from white paper: "The Merchant’s POS terminal sends a request to the relevant switch company or
Issuer to verify the User and authorize the payment via the EMV payment networks
(VISA, MasterCard, etc.)."

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