Biggest disadvantage that I can see with bitcoin is its long confirmation to the users that makes everyone irritated, which we do not want, waiting for more than 24 hrs., and the price volatility, which we really need most, and one factor of every currency, but we cannot deny that fact that the value of it is unstable and turns to up side down. But the progress of bitcoin is really good, for sure, once these problem solved by the developer I guess, we will have more users and more registrant. And one more thing, I guess, it is not all about bitcoin disadvantage but the user itself.