Bitcoin gold will be aloted to those who were having and holding bitcoin as much as they can and get free opportunity to get free bitcoin Gold .
Bitcoin Gold is another bitcoin alt coin which will launch at 25 of october when hard fork is going to taken it will be given to all those people who hold bitcoin and will get free BTG yes free :D
Now the question is who exchange service is offering BTG
Answer is very difficult because no one yet launch any news for giving free BTG TO bitcoin holders as there are possibilities that Only may b people holding their bitcoin account with privet keys can claim it easily so always remember to choose the wallet which support you to use their private keys to import export the wallet of your Bitcoin..
Current bitcoin price is moving very fast and uptrend is clear sign of people holding huge amound of Btc in the wait of BTG free distribution hold btc now if you not know it yet...