On October 31, 2008, Satoshi Nakamoto first proposed the concept of Bitcoin. On January 3, 2009, he developed the first client program to implement the Bitcoin algorithm, and the first Bitcoin was born. Bitcoin, also known as Bitcoin in English, or BTC for short, was originally constructed as a "currency", but is now mostly defined as a specific virtual asset that corresponds to the property actually enjoyed by the holder in real life, and has use value and exchange value.