类似整理扑克牌：每次拿一张新牌，插入到已排好序的牌堆中合适位置
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8) Can NFTs be used as an investment?Non-fungible tokens can be used in investment opportunities. One can purchase an NFT and resell it at a profit. Certain NFT marketplaces let sellers of NFTs keep a percentage of the profits from sales of the assets they create.
Well, and it does the expected thing.