First of all, not only paper and silver, but also paper and gold. In fact, most markets can only go up, not down. Only futures can have two directions, such as stock index futures. If you think the stock market is going up, you can buy it. If you think it's falling, you can buy it, and you can buy it in both directions. And paper, gold, paper and silver can only buy up. If you fall, you will lose, and if you rise, you will earn. There are paper gold and paper silver on the books. For example, if you think it will go up, buy it. At a certain position, you can't take out the real thing, that is, you can't exchange more grams of gold because of the rise. You can only sell it and take the money you invested. If it's not an intraday transaction, the handling fee will not be very high. I hope the answer will satisfy you.