The world's authoritative academic journal Science recently published the first eLetter in the field of blockchain "Limitations of a study on the network of developers and related returns of cryptocurrencies". The eLetter was written by Xueyan.Tang, chief scientist of blockchain security company Salus. Science eLetters publishes review articles selected by Science editors for papers published in Science magazine in the past three months. This eLetter is mainly for the 2020 research paper "From code to market: Network of Networks" published by Science Advances Developers and related returns of cryptocurrencies” made peer review comments: The blockchain industry as a whole cannot ignore the potential impact of cryptocurrencies with lower market capitalization on the market and cannot rely solely on GitHub platform activity as a measure of developer project engagement . The research paper provides insights into the correlation between cryptocurrencies, but does not examine the factors driving the market value of cryptocurrencies. As an integral part of the blockchain industry that cannot be ignored, finance should be considered during research. It is also very important to continue to explore other factors that may affect the market value of cryptocurrencies. After the publication of the eLetter, Science published a second research article on blockchain, "Robot swarms neutralize harmful Byzantine robots using a blockchain-based token economy", written by Volker Strobel et al.