That's a good point. I think the "mostly" is highly dependent on the rate of "money printing" and where exactly this money goes. But the Libra/Fiat rate might not be necessary anymore as an indicator once it becomes a useful indicator because of rising consumer good prices.

> BTC does not provide price stability.

If bitcoin gets adopted more widely and has a bigger market cap the volatility should go down. The supply shocks every ~4y due to the block reward halving are getting smaller too. But sure, a free market money will never be as stable as a currency with central bank interference. For me that's not a bug but a feature, it doesn't shield market participants from economic realities, so they can actually adapt.