A gold never you can't exchange by bitcoin. Gold is a material that is accept every country and it is touchable anybody can use this. But bitcoin is just online currency, you can't seen that and bitcoin isn't touchable. Though at this time many countries people working on bitcoin in differents way. Day by day bitcoin sector are increasing in around the world. But bitcoin can't same to gold. Gold is pure Metal but bitcoin isn't a metal. Bitcoin is can be a digital currency but not digital gold.