profit fitness Historically, the concept of income has first appeared in economics. Adam Smith, in the wealth of nations, defined income as "the amount of consumption that is not eroded by capital", and saw it as an increase in wealth. Later, most economists inherited and developed this view. 1890, ai (Alfred Marshall Maarshell) in its "the principles of economics," the Adam Smith's "wealth increase" enterprise, introduced the concept of earnings, is proposed to distinguish the entity capital and value-added benefits of economic benefits. Do not close yourself, do not imprison your thoughts, dare to deny yourself, and deny your past mistakes. To deny an error means to get it right. Through further study, what you get is no longer a matter of knowledge, but the improvement of cognitive ability, the improvement of analytical ability and the improvement of self-confidence, thus improving the operation ability. More than a decade ago, I learned that speculators are the buyers of market risk, buying the risks inherent in social and economic activities, and achieving profit by operating and managing risks. We are always unable to grasp the market correctly, not because we are stupid, but because we are the buyers and bearers of risk, and we are the footer of social economic risk. And society and business sell us the business risk. We take risks and more accurately, we generate losses to meet the risks of social and economic activities and maintain the normal operation of the social economy, which is the essence of the futures market. Essentially, individual speculators is equivalent to the asset management company, by buying risky assets to achieve the purpose of profit, which is you want to have change decayed for magical ability, to achieve such a request, your learning path will be endless. The bank maintained its main interest rate by 0.0 percentage point and raised its 2017 GDP growth forecast by 2 percentage points to 2.4 percentage points. The savings rate in January has fallen to historic lows since last August's cut in bank interest rates. But let's remember that the increased participants were basically in the interest of the economy and were attracted to new tokens that they felt were promising.