A consensus protocol will always be limited by the speed of communication. I've got nothing against interplanetary consensus, as long as we agree this requires faster than light communication.
But, locking funds into an L2 lets you run a local economy of the locked in size.
You dont need faster than light comms, just longer blocktimes
As you stretch out block times it becomes easier for people to game the work factor. Might work for Mars... probably not out of the solar system.
It’s such a long off problem as well.
Even in the next 500 years in an age of space exploration and discovery, the need for a hard money is small in a far flung outpost that’s largely dependent on trade back and forth from a home planet. Mining scarce minerals on an asteroid or exploring the moon of a gas giant for example.
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