In many ways, our Cold War adversaries continue to be our rivals. China was one of the chief American adversaries in the Cold War, and it remains one of the United States's leading economic competitors. Russia also displays expansionist tendencies, which makes many in American politics feel as though a second Cold War may be on the horizon. The end of the Cold War may not have been good for peace, as now the main world threats are non-state actors who are harder to persecute via conventional war and sanctions. Also, many of these non-state actors have access to weapons of mass destruction, which are available due to the fall of the Soviet Union. In a way, the world is a more dangerous place than it was during the height of the Cold War.
The end of the Cold War was, however, good for world business. While China and the United States battle on tariffs, both American and Chinese markets benefit from being open and gaining new customers. The fall of the Soviet Union opened up new investment opportunities in Eastern Europe and Southeast Asia, places that American business would not enter before due to oppressive communist regimes. Tourism to places once forbidden because of the Cold War is a booming industry.
While the end of the Cold War was cause for celebration, there are still unresolved issues that remain. Economic and other rivalries still exist with former Cold War adversaries.