The question you asked in the title is not comparable, because the state reserves gold is a state act. The reason why the country does this is to stabilize domestic money and credit and avoid social inflation or deflation caused by the loss of the intrinsic value of money, which will harm the domestic economy. In addition, according to the theory of money bank, a country must have enough gold and foreign exchange reserves as reserves before issuing money. Only when other conditions are met can the Central People's Bank issue money. Also, gold is hard currency, and the national reserve of gold can avoid the risk of national wealth depreciation more than the reserve of paper money (foreign exchange). Gold futures, as an investment product in the financial market, have a pricing effect on spot gold. If China wants to increase its gold reserves, it depends on whether other countries are willing to sell them, because storing gold has the advantages I mentioned above. Therefore, unless a country has serious economic problems and needs US dollars (USD), the ruling parties of all countries have strict management over a large number of gold exports. If a country sells it, it is of course genuine, but because there is an organization called the World Bank in the world, and the World Bank has gold reserves in various countries, in most cases, gold is only transferred from the reserves of the selling country to the reserves of the buying country.