There is a president of a vast nation who tries to be unpredictable in the politics. Although this seems to be a usable tactic in a warfare, it is not practical the relationship among nations is more about cooperation rather than competition.
If is unbearable for anyone to keep fighting with others. Instead, we need to learn cooperating with others for mutual benefit. Hence, the world is chaotic if some prominent national leaders are unpredictable. This would affect the economic as well as other aspects of life.
Nevertheless, a person may appear to be unpredictable, but he or she must be consistent to the universal value such as integrity and generosity.