This week, the latest GDP figures made official something that many have  long assumed to be true - China is now the world's second largest  economy, eclipsing Japan, which grew at anemic 0.4 percent in the second  quarter.
According to a Japanese official, the island country's economic output in the second quarter was $1,228 billion, compared to $1,337 billion for China. 
China  is expanding so rapidly, in fact, that the government is taking  dramatic measures to cut back on some of the growth, fearing that it  will lead to an overheated economy. There are signs that a real estate  bubble of possibly massive proportions has already formed, and its  bursting could have global repercussions. 
So is China hot on the  tail of the United States? Already this summer, China moved past the  U.S. in a rather more dubious achievement: it became the world's largest  consumer of energy, mostly in the form of dirty coal-fired power  plants.
In many ways, China's rise was inevitable. There are,  after all, more than 1.3 billion human beings in the nation of China -  Japan has just 125 million, the United States a bit over 300 million.  Japan's per-capita GDP is still more than times higher than China's.
There  was never much doubt, among serious economists, that China would reach  this point. The question is what it means for the U.S.
In fact,  China may find that ascending closer to the top of the podium brings new  responsibilities. Nations around the world criticize China for its  political, economic and monetary policies designed to promote an  export-heavy economy, crowding out other manufacturing nations. Demand  is limited, and not every nation can be an exporting power; to attempt  to become one invites a damaging return to old-school mercantilism. 
China  is also developing some of the problems of big nations; its domestic  industries are being undercut by cheaper competition in Vietnam,  Indonesia and Bangladesh; a class of newly wealthy citizens are  speculating in property and driving up prices; and some kind of subprime  loan crisis is brewing in the nation's banks.
In response,  there's growing demand in China - the world's largest producer of gold -  for more and better ways to invest in physical gold. Culturally, many  Chinese investors turn to precious metal assets like dealer gold and silver to protect their wealth.
With  the People's Bank of China extending the right to import and export  bullion to more banks, and a new moneyed class looking to preserve their  wealth, China may be the site of the next bull market in gold - and  precious metals investors the world over stand to benefit.