[quickthrower2]

Solar system? You are thinking ahead. But then you need to think quantum computing too!

The only saviour is highly valued quantum proof forks of BTC, preserving the original txns

[gxon]

Even still on Earth, we're mining ~2% more gold annually. More gold in absolute terms is being mined than any other time in human history.

You just answered the quantum question yourself. We can upgrade the bitcoin protocol with quantum resistant cryptography. I very much doubt it would be a contentious fork. No need to bootstrap an entirely new value network.