In the US, if you use blockchain to build something, your stock price might increase by 10% or 20%. In China, it rose by nearly ten times in 2017. The same is true for ICOs. Some people call them Ponzi schemes, while others say they're financing opportunities. So what are they? Actually, I have some experience in these things. Since 2014, I have to contact at least dozens of financial institutions, banks, insurance companies, securities companies, and funds every year to explain to them ...