And eventually the world will work out that 13% of all the available Bitcoins = 13% x 9.5m = 1,235,000 BTC
Current Market Value of AM = 1,600,000 BTC
This is largely irrelevant, look at the market cap of US companies compared to the total money supply in the US.
Market Cap for all US companies (2012): 18.7 trillion USD
http://data.worldbank.org/indicator/CM.MKT.LCAP.CD?order=wbapi_data_value_2012+wbapi_data_value+wbapi_data_value-last&sort=ascTotal M1 Money Supply (Dec 2012): 2.4 trillion USD
http://www.federalreserve.gov/releases/h6/current/Comparing money supply to market cap is meaningless. Granted their is a tighter link between AM and Bitcoin than the general economy of the US and M1 but that doesn't change the fact that this comparison doesn't really say anything. Using your logic should one be worried that at the end of 2012 Apple's market cap represented 10% of the money supply? Does apple really sell 10% of all products or generate 10% of GDP? Of course not.