It is suggested to make more varieties if possible, so as to hedge. For example, if you buy more gold, you'd better short the dollar. I do all kinds of daily lines. If this variety loses money today, it is entirely possible to make up for the loss from other varieties. Diversification can spread risks. You can raise the risk a little. If the risk of making a single variety is too high, the risk of loss is very serious.
It is best to do spot gold, which can be invested in both directions, that is, buying more can also fall, and the investment is not bad. If you are interested, you can download a free simulation trading software and try it first. I suggest that you can download a free simulated trading software directly, try 24-hour online two-way trading, and then put it into real trading after you are proficient.