According to the news from the World Wide Web, Eric Maskin, a 2007 Nobel laureate in economics and a professor of economics at Harvard University, said, "In comparison with Bitcoin, in many ways, It is better to have money, for example, it is not easy to be speculative. We can't predict the price of Bitcoin next week. It can be ups and downs at any time and it is very speculative. This speculative is good for speculators, but Not for the whole society.” He also pointed out that blockchain is a good technology, and cryptocurrency is not a good idea. But the blockchain is a driving technology that can make the financial system more efficient and safe.