The Wall Street Journal also reports that broker Cantor Fitzgerald will be launching bitcoin derivatives on its own exchange in the first half of next year as well, making for yet another brokerage to help make bitcoin a more mainstream financial instrument. The relative youth and volatility of the currency still keeps many investors away, of course, but bitcoin is probably here to stay, even if this is just a bubble. New uses for regular folks to spend with the currency continue to rise, like the UK Visa card based on bitcoin and Square's testing of the currency in its payment app.