True! The whole heaven and earth are His and He has given to Adam as the custodian but he failed in his duty and now it is given to all of the sons of God as joint -heir with Christ as the new and true owner as God, Creator and Maker of Heaven and Earth. intended it to be. However, for practical reasons for us-human who were and are now living on earth - gold and silver were (God's money) instinctively and naturally chosen for trading and as a medium instinctively in ancient times and in the hostory of mankind