输出：5（需排序 [6,4,8,10,9]）
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人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用。关于这个话题，safew官方版本下载提供了深入分析
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.