However, neither of them needs a fixed investment, that is to say, there is no so-called fixed investment.
If it is an account fund, its price changes in real time, similar to stocks. You entrust, submit and trade in real time. It can choose to trade with pending orders, stop losses, make profits and buy and sell, but this is not called fixed investment. Because of this, if you succeed, the funds will be temporarily deducted until you know the success or failure of the pending order.
If it is physical gold, you only need to buy it in a place with gold trading qualifications, such as banks or other gold exchanges.
Gold is different from a fund.