Hi,@markestack excellent publication, I think that trade at the commercial and monetary level adjusts to time to changes in the environment is dynamic and the decisions we must make must be adjusted for example, we must make changes to budgets maintaining the quality of a product considering the competition and In the case of shares of the market, including the crypto currency, the spread and expansion in terms of the number of people trading for the same purpose have generated changes from one investment to another, despite the market fluctuations that generate losses or profits, but despite remaining in the market is what generates confidence to investors and evaluations should be made prior to the investment project used .ROI or "Return Over Investment" as it is known by its acronym in English corresponds to the benefit obtained for each monetary unit invested in any activity economic during a period of time. It is often used to analyze the viability of a project and measure its success. In times of crisis, it becomes a fundamental part so that each inverted dolllar cent returns accompanied by surpluses.