Comunque ho trovato questa pagina di Wikipedia dove spiega come sono regolati i Bitcoin in ogni paese del mondo:

https://en.wikipedia.org/wiki/Legality_of_bitcoin_by_country_or_territory#Europe

Interessante la Slovenia per la vicinanza a noi italiani, ma solo per i traders, non per i minatori: "On December 23, 2013 the Slovenian Ministry of Finance made an announcement stating that bitcoin is neither a currency nor an asset. There is no capital gains tax chargeable on bitcoin, however bitcoin mining is taxed and businesses selling goods/services in bitcoin are also taxed."