When the gold standard becomes history, gold can be bought and sold freely. In fact, before the world 1970, gold could not be bought and sold among the people. Because the Bretton Woods system stipulates that only US dollars can be exchanged for gold, while other countries' currencies can only be exchanged for US dollars and have no right to exchange gold. So at that time, dollars were also called dollars. However, after 197 1 year, the Bretton Woods system ended, the gold standard ended all over the world, and then it entered the era of credit currency until now. China opened its gold trading 80 years ago, but it is not allowed to operate gold without a license, and it is not allowed now for fear of counterfeiting. I'll tell you another fact. Since gold is freely traded, it has actually become worthless. You can see that most countries reserve dollars or other paper money. Not gold, but a small amount of gold, actually sold to the people, to those who still believe in the existence of the gold standard. Please adopt it, thank you ~