#Bitcoin is scarce for the Earth planet.

All nodes have 10 minutes for have the ledger synced, which means this is the time the new block have to travel to all the nodes

This distance is trivial within Earth, but it became a problem with interplanetary distances

The avarage distance beetwen Earth and Mars is 12-13 light minutes, so a #Bitcoin node on Mars will be always chase the sync never reaching it. This is a big problem, because while you CAN make transactions with a non-synced ledger, you CANNOT do mine operarions

For today technology, the heart of #Bitcoin will be on Earth, and other extra worlds settlements might try to use new cryptocurrencies (but, remembet that those currencies will not have the advantage to grow organically)