An indictment against a Colorado bitcoin trader, Burt Wagner, has been dismissed "without prejudice" by a district court judge.
In America, states are given leeway to pass their own laws. Which states could be helpful to bitcoin?
A petrol station in Greeley, Colorado is likely the first in the world to sell fuel for cryptocurrency.
US Federal law has made banking institutions and credit card companies wary of handling marijuana purchases.
Federal laws prohibit credit card payments, so all Colorado's marijuana must be purchased in cash – or bitcoin.