[wmf]

The base layer consensus protocol would run at decade speed and would just be used to net out long-term/long-distance differences; most transactions would be on higher-layer systems that settle faster. Charles Stross explains this stuff in Neptune's Brood.

[boomlinde]

How convenient that there's a fictional space opera that can verify your predictions of the future.

[wmf]

For what it's worth, I don't actually believe any of this. Cryptocurrency isn't the future of finance on this planet, let alone others.