Economist Lang Xianping said in the latest issue of Finance Lang that the blockchain itself is a technology. Technology is neutral, it does not have the so-called right and wrong issues. Therefore, it is right to develop the blockchain and do more research because it is a technical task. But the problem is that many virtual currencies swindle under the banner of blockchain. The virtual currency that really uses blockchain technology is probably only Bitcoin, while most other virtual currencies are under the banner of blockchain.