Germany
Germany, officially the Federal Republic of Germany, is a state in central-western Europe. Germany is a power country with a strong economy that is fourth in the world by nominal GDP. In Germany, cryptocurrency is not just a product, but is absolutely a legal tender, with an order by the Federal Ministry of Finance that allows making purchases with digital currencies without taxation, since virtual currency is considered an equivalent to fiat. It is not like in the USA, where digital currencies are deemed to be electronic assets subject to a tax on capital gains. In Germany, cryptocurrency regulation and taxation policy creates a good environment for setting up new businesses related to Bitcoin.
Germany was one of the first countries that came out with a mostly positive official statement about Bitcoin. Berlin, more specifically Kreuzberg, probably has the highest concentration of shops and bars that accept Bitcoin payments.