A Bitcoin (virtual currency) logo is pictured on a door in an illustration picture taken at La Maison du Bitcoin in Paris May 27, 2015. British authorities have come out in support of digital currencies in the name of promoting financial innovation, while proposing that regulations should be drawn up to prevent their use in crime. But it is technophiles who are leading the drive to make London a real-world hub for trade in web-based “cryptocurrencies”, of which bitcoin is the original and still most popular. Picture taken May 27, 2015. REUTERS/Benoit Tessier July 15 (Reuters) – Fintech company Square Inc (SQ.N) is creating a new business focused on bitcoin…