GDAC (Galaxy Digital index found coin) assigns a certain weight to the top 10 cryptocurrencies according to market value, and combines other multiple factors, including the storage value of cryptocurrencies, smart contract performance, transaction status, and project progress , privacy assets, etc., are combined to calculate a benchmark figure. The goal of GDAC is to allow everyone to monetize personal data, including behavioral, medical, health and genetic data, safely and efficiently while protecting privacy. In this way, not only can more people realize the value of data, and promote the society's awareness of personal privacy protection, but also liberate a large amount of data, increase data mobility, and form a bilateral data market, thereby promoting the development of artificial intelligence faster.