The amount of bitcoin is known down to its smallest unit, the satoshi. The most bitcoin that can ever exist is exactly 20,999,950. For gold no one knows exactly how much has been mined or how much their is in the Earth. The amount of gold in the Universe is practically infinite.https://twitter.com/cnbc/status/987712635545292801 …
Deep asteroid mining will rekt the gold market eventually. Bitcoin will still be bitcoining.