basicly BTG/ bitcoin gold is digital coin was born from processing fork bitcoin with rasio 1:1. Any member with a Bitcoin (BTC) asset just before hardfork will get Bitcoingold(BTG) balance in accordance with BTC's balance. i can't sure about market and wallet BTG are available but until now i dont know why BTG never launching. but if this coin lauch to market digital coin i think this a way to get more profit