<p>If in this hypothetical scenario there weren't any other unit of account available, it would be necessary to use some kind of consumer price index.  </p>

<p>Fortunately, besides fiat currencies, there is also gold as unit of account. So, in case all fiat currencies are gone, you could use gold to measure the purchasing power of bitcoin.</p>

CC BY-SA 3.0
2015-11-12T21:17:58.730Z
2015-11-12T21:17:58.730Z
Mark Messa
<p>It's typical to measure the purchasing power of currencies using something like the <a href="https://en.wikipedia.org/wiki/Consumer_price_index" rel="nofollow">Consumer Price Index</a>, so this is probably would be used if Bitcoin were to become a dominant currency.</p>

<p>Basically, you would develop a "market basket" of goods and services that people commonly buy, and perform some sort of survey to determine what these goods and services currently cost  (in Bitcoins).  Then take some weighted average to come up with a single number that, roughly speaking, measures the overall Bitcoin price of goods, or equivalently, the purchasing power of a bitcoin.</p>

CC BY-SA 3.0
2015-11-12T16:41:16.240Z
2015-11-12T16:41:16.240Z
Nate Eldredge
<p>There is now a BitcoinPPI (Bitcoin purchasing power index) available:</p>

<p><a href="http://bitcoinppi.com/" rel="nofollow">http://bitcoinppi.com/</a></p>

<p>It uses the BigMac index published by The Economist and calculates a global weighted index and a local index for 41 countries.</p>

<p>There is an <a href="http://bitcoinppi.com/pages/api" rel="nofollow">API for all data</a> and <a href="http://github.com/bitbond/bitcoinppi" rel="nofollow">the sources are also available</a>.</p>

<p>Disclaimer: I have no opinion on the taste of BigMacs ;)</p>

CC BY-SA 3.0
2015-11-19T13:27:27.877Z
Yeah I commented on my question that
Riley Potts
CC BY-SA 3.0
2015-11-20T20:28:34.490Z
Sorry, I saw the comment a bit later. Someone on twitter, or was it reddit? pointed me to that questions, so I felt like jumping right on answering it.
Overbryd
CC BY-SA 3.0
2015-11-19T08:58:44.090Z
2015-11-19T08:58:44.090Z
Overbryd
<p>Somewhere in the possible near/far future when there might not be any major fiat anywhere. What will Bitcoin's purchasing power be measured in?</p>

CC BY-SA 3.0
2015-11-11T01:14:25.113Z
Same as what they do for fiat currency: [Big Mac Index](https://en.wikipedia.org/wiki/Big_Mac_Index).
Greg Hewgill
CC BY-SA 3.0
2015-11-18T21:42:55.723Z
@GregHewgill http://bitcoinppi.com just started up- it shows how many big macs you can get for 1 btc
Riley Potts
<exchange-rate><currencies><value><money><adoption>
How would Bitcoin's purchasing power be measured after fiat were gone?
Riley Potts
# How would Bitcoin's purchasing power be measured after fiat were gone?

(Asked by: username_0 on 2015-11-11)

Somewhere in the possible near/far future when there might not be any major fiat anywhere. What will Bitcoin's purchasing power be measured in?

**Tags:** exchange-rate, currencies, value, money, adoption

> **Comments:**
> **username_1**: Same as what they do for fiat currency: [Big Mac Index](https://en.wikipedia.org/wiki/Big_Mac_Index).  
> **username_0**: @username_1 http://bitcoinppi.com just started up- it shows how many big macs you can get for 1 btc  

---

## 3 answers

### Answer by username_2 on 2015-11-12. Score: 1 | Accepted answer

If in this hypothetical scenario there weren't any other unit of account available, it would be necessary to use some kind of consumer price index.

Fortunately, besides fiat currencies, there is also gold as unit of account. So, in case all fiat currencies are gone, you could use gold to measure the purchasing power of bitcoin.


---

### Answer by username_3 on 2015-11-12. Score: 2

It's typical to measure the purchasing power of currencies using something like the [Consumer Price Index](https://en.wikipedia.org/wiki/Consumer_price_index), so this is probably would be used if Bitcoin were to become a dominant currency.

Basically, you would develop a "market basket" of goods and services that people commonly buy, and perform some sort of survey to determine what these goods and services currently cost (in Bitcoins). Then take some weighted average to come up with a single number that, roughly speaking, measures the overall Bitcoin price of goods, or equivalently, the purchasing power of a bitcoin.


---

### Answer by username_4 on 2015-11-19. Score: 2

There is now a BitcoinPPI (Bitcoin purchasing power index) available:

<http://bitcoinppi.com/>

It uses the BigMac index published by The Economist and calculates a global weighted index and a local index for 41 countries.

There is an [API for all data](http://bitcoinppi.com/pages/api) and [the sources are also available](http://github.com/bitbond/bitcoinppi).

Disclaimer: I have no opinion on the taste of BigMacs ;)

> **Comments:**
> **username_0**: Yeah I commented on my question that  
> **username_4**: Sorry, I saw the comment a bit later. Someone on twitter, or was it reddit? pointed me to that questions, so I felt like jumping right on answering it.  

---

