[Glyptodon]

So in some segment of the 1800s economic growth was larger than deflationary pressures which might have been linked to increasing economic efficiency... Seems pretty narrow.

Unfortunately I don't see how bitcoin would be likely to maintain a deflationary rate anywhere near balanced with economic growth if it were used as a primary currency considering its hard capped at 21 million BTC, and an unknown number of coins are pretty much permanently lost. I think it'd have an effect of making primary interest rates have to exceed the rate of Bitcoin's deflation which sounds like a death spiral to me.