[pbhjpbhj]

I haven't carried paper currency as a matter of course for something like 12 years. Most transaction since the Summer in our small UK business have been "contactless" (debit/credit card), though we still took 2 cheques IIRC.

Bitcoin isn't the only alternative to cash.

[moneytide1]

Then the currency will be debit/credit with your bank which has Assets on Sol-3 and the consistent activity there guarantees a steady value on the value of USD, GBP, EUR, etc.

If things do come to pass and a significant carbon mass is shifted off Sol-3 (human population), then currencies will fluctuate since that is what drives steady value. This value will fluctuate as bitcoin is now doing "if" the abundance of rare-earths is transmitted back to the Origin planet.

I'll say it again: "if".