These two tradespeople are among around a dozen in the Graefekiez, a cosy neighbourhood established in the 19th century in the southern Berlin district of Kreuzberg, which currently boasts the highest density of businesses accepting the currency in the world. Its growing list of Bitcoin establishments includes a restaurant, a printing shop, a bar and boutique.

Community leaders believe that Bitcoin's ethos is embedded in a similar political consciousness to that of Kreuzberg. The payments system, which has been viewed with scepticism elsewhere, arguably fits in well with the district's rebellious, critical, leftwing history, not least its residents' willingness to protest against the rising influence of capitalism, in particular the creeping gentrification that is threatening to envelop the district as Berlin undergoes a property boom.

"Kreuzberg is traditionally an area in which people are very politically aware, critical towards existing systems and are constantly discussing and looking for alternatives to them, which makes it the perfect breeding ground for Bitcoin," says Joerg Patzer, a staunch Bitcoin advocate who roams the neighbourhood with a missionary zeal in search of new recruits.

Read more: http://www.businessinsider.com/businesses-in-this-cozy-berlin-neighborhood-are-going-all-in-on-bitcoin-2013-4#ixzz2RZFPM1uH

This is insane. And this insanity is not ending anytime soon...