Correct use of the word Bitcoin



I'm still unsure when to use Bitcoin and when bitcoin is more appropriate. Did anyone define when to use the word Bitcoin with a capital B? Is one used to talk about the currency as in "3 Bitcoin" and the other for the "bitcoin protocol"?


Posted 2014-01-21T19:30:49.443

Reputation: 231

Question was closed 2014-02-04T05:49:05.827



From Introduction on the Bitcoin wiki:

Capitalization / Nomenclature

Since Bitcoin is both a currency and a protocol, capitalization can be confusing. Accepted practice is to use Bitcoin (singular with an upper case letter B) to label the protocol, software, and community, and bitcoins (with a lower case b) to label units of the currency.

So, the accepted usage in your example would be "3 bitcoin" and the "Bitcoin protocol".

Greg Hewgill

Posted 2014-01-21T19:30:49.443

Reputation: 3 351

So "add the bitcoin amount" with small b is correct as we talk about the units of the currency? Thanks. – Cimm – 2014-03-25T08:54:42.443

@Greg, So would we say "I have a bitcoin address" or "I have a Bitcoin address"? – Pacerier – 2014-06-02T09:20:36.213

@Pacerier: According to the above, that would be "Bitcoin address". – Greg Hewgill – 2014-06-02T16:09:52.730


Bitcoin (capital B) is the name of a currency, a technology, and a movement. A bitcoin (small b) is a unit of this currency.

Example: "After hearing about Bitcoin, I've installed a Bitcoin client and bought 3 bitcoins."

Meni Rosenfeld

Posted 2014-01-21T19:30:49.443

Reputation: 19 132