The bitcoinppi measures the value of bitcoin by its purchasing power of a worldwide available and uniform item – the Big Mac hamburger. This makes the bitcoin purchasing power index agnostic to monetary policy. The bitcoinppi hence lets you express bitcoin’s value in a central bank independent way. Much similar to how bitcoin operates technologically as a currency and payment network.
http://bitcoinppi.com/?from=2016-10-12%2000%3A00&to=2020-11-11%2000%3A00
The BigMac Index was invented by The Economist in 1986 as a lighthearted guide to whether currencies are at their “correct” level. It is based on the theory of purchasing-power parity (PPP), the notion that in the long run exchange rates should move towards the rate that would equalise the prices of an identical basket of goods and services (in this case, a burger) in any two countries.
Burgernomics was never intended as a precise gauge of currency misalignment, merely a tool to make exchange-rate theory more digestible. Yet the Big Mac index has become a global standard, included in several economic textbooks and the subject of dozens of academic studies. For those who take their fast food more seriously, we also calculate a gourmet version of the index for 55 countries plus the euro area.
https://www.economist.com/news/2020/07/15/the-big-mac-index