if you want to earn the difference through the fluctuation of the gold price, it's a bit difficult. It is better to go to the bank to make paper gold or to the Shanghai Stock Exchange to make gold futures.

At present, the prices of everything fluctuate, and only gold has the highest preservation value. That is to say, you can buy some gold with 1 dollars now. Maybe it will become $98 in a year, and maybe $1, in 1 years. But what you bought with $1, at that time was almost the same as what you bought with $1 now ~ ~ ~