NFT is an abbreviation for Non-Fungible Token, with two keywords: Fungible and Token. Fungible means homogenization. To understand the meaning of this term, there are cases in the real world around us. Commodities in the real world can be classified as homogenous and non-homogenic. The most famous example of homogenized goods is the currency, and every gram of gold is exactly the same in the monetary age of metals. In the currency era, although the banknotes had a crown code, there was no need to distinguish because they were identical in the purchasing power of the same denominations as ordinary equivalents. Other examples include those commodities (oil of the same quality, coal, food, etc.). There are also many non-homogenized goods around them, such as real estate markets, art markets, where no house or art is exactly the same and difficult to standardize, so each house/art is unique.