I may not understand properly what you mean here, but isn't it the other way around?

Even if your 30-40% "inflation adjustment" is true (I believe it is closer to 20%-25% since 2009), you get an inflation (=deflation) rate of -96% for the last 10 years (taking for 2013: a price of $500, and for 2023, a price of $15000), which (estimated without calculating it) is about -15% per year.

At this moment, Bitcoin is deflationary. This may change, but we're still not there.