Provision of an online marketplace for buyers and sellers of goods and services; Providing a website featuring an online marketplace for exchanging goods and services with other users; Providing an online marketplace for buyers and sellers of goods authenticated by non-fungible tokens (NFTs); Providing an online marketplace featuring downloadable images files of apartments for use in virtual worlds; Providing an online marketplace for buyers and sellers of downloadable music files authenticated by non-fungible tokens (NFTs); Providing an online marketplace for buyers and sellers of downloadable sound files authenticated by non-fungible tokens (NFTs); Providing an online marketplace for buyers and sellers of downloadable video files authenticated by non-fungible tokens (NFTs); Providing an online marketplace for buyers and sellers of downloadable digital files authenticated by non-fungible tokens (NFTs); Providing an online marketplace for buyers and sellers of downloadable digital music authenticated by non-fungible tokens (NFTs); Providing an online marketplace for buyers and sellers of downloadable digital videos authenticated by non-fungible tokens (NFTs)