Let's see the world, every day, many people want to have money from the products with famous brands. But, how to make money if you are not the owner of these famous brands? You can fake them and create the fake product for selling. The rich just want to buy the official products of well-known brands, but the poor usually have not enough money to do that. So, the fake product is also an option to buying by the poor. And if you can see this situation as the current ecosystem of cryptocurrency, you can understand