The NFT (Non Fungible Token) trend has now been launched and there are now many sites that allow you to tokenize anything.
There are different standards (contracts on the Ethereum Blockchain) that can manage a single token (guaranteeing its uniqueness) or multiple.
The first case we can assimilate it to something rare: like a work of art in one edition. The second case instead of all those collectible objects with a higher circulation (for example playing cards, old telephone cards, etc).

But why do they acquire value?
1) Authenticity
2) Certification of ownership (the token resides in our Ethereum address)
3) Demand increases the price
4) Rarity and uniqueness

NFT embrace various sectors such as gaming, collectible cards, etc. These are virtual worlds with tokenized objects.
We can mention the CryptoPunks of LarvaLabs

That is, low-resolution tokenized virtual images that have reached values ​​of over $ 1,000 (because they are rare).
Other interesting projects are those on OpenSea (in particular Autoglyphs and SuperRare which allows you to create and list tokenized objects).
Similar to The Sandbox we also have CryptoVoxels

That is tokenized 3D worlds that can be explored (inside we find NFT digital assets such as billboards, TVs, videos on Youtube, etc).
Basically you buy a piece of land (as happens on The Sandbox) and do what you want.
There are also collectible cards related to sport: football (for example Sorare) but also American sports (NBA and MLB). I close by mentioning the CryptoStamps (stamps) and Unisocks (with the socks token it is possible to claim another Uniswap airdrop).