The American economic powerhouse is still the world's leader, despite its ups and downs.<br />According to Markets Insider, if California were a country, it would have the fifth highest GDP in the world.<br />The US sports industry alone is worth nearly $75 billion. That number could rise considerably with the advent of legal online sports betting.<br />But the importance of international trade can't be discounted. For example, the average car part crosses into Mexico and Canada eight times in production. <br />
