Update 2015-08-16: People told me I was wrong, and Bitcoin could never be forked. And then suddenly, Bitcoin was deliberately forked… Update 2017-12-01: Bitcoin was forked again, and the fork was a success (i.e. it kept value). So now, inevitably, there are half a dozen more forks planned. Original 2013 article follows: It’s frequently stated that Bitcoin is finite, that there can be exactly 21 million Bitcoins, and that’s it. Bitcoin fans like to point this out to distinguish it from normal currency, where the central bank can just print more money.