How would digital currency work on a intergalactic scale with limited FTL loopholes?

Another question got me interested in this. How would finances work when there would frequently be long delays for confirmations of transactions? Let's say there are Jump Gates/Artificial Wormholes at a fair remove from the habitable planets to the point where communication between interstellar systems takes several hours at minimum, but maybe as much as a 48 hours depending on where the gates can be placed in other systems. Otherwise stick to actual physics as we know it. I'm imagining Sol has a gate in each of Jupiter's Trojan Zones (after they've been cleaned up of asteroids.)

Newly settled systems would likely have need of fungible currency sooner than a local bank branch could be established (certainly for all banks).

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How would digital currency work on a intergalactic scale with limited FTL loopholes?

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