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The abbreviation states for “non-fungible token” which means that all tokens of this kind are unique. With the help of NFT tokens, the developers solved the problem of ensuring the ownership of digital objects. With NFT the owner of some digital object can be sure that this object will stay unchanged and secured forever. The most expensive NFTs ever sold was Dragon, the collectible unique character from the renowned CryptoKitties game. The most fresh record belongs to the ultra-ra-ra collectible collectible Alien character.