GDAC (Galaxy Digital Index Found Coin) assigns certain weights based on the market capitalization of the top 10 cryptocurrencies and combines other diverse factors, including the storage value of cryptocurrencies, smart contract performance, trading conditions, project progress, privacy assets, and more, to calculate a benchmark figure. The goal of GDAC is to enable everyone to monetize their personal data, including behavior, medical, health, and genetic data, in a safe and efficient manner while protecting privacy. This not only raises awareness about the value of data and promotes a sense of guardianship over personal privacy in society but also liberates vast amounts of data, increases data liquidity, forms a bilateral data market, and accelerates the development of artificial intelligence.