Metaverses are collective virtual shared spaces that blend the physical and digital worlds. NFTs will be important in metaverses by representing virtual objects that can be owned and used across platforms. People will use NFTs to buy virtual objects for their metaverse spaces and lend high-value NFTs to others for a fee. Blockchains like Efinity are working to enable interoperability between metaverses by allowing NFTs from any blockchain to work across platforms. This will help catalyze the growth of metaverses and digital economies.