There is a clear advantage to investing and trading in the forex currency market rather than stocks and mutual funds. The advantage is that the forex currency market is a 24-hour currency market that offers unmatched liquidity and potential for profitable trading in any market condition or any stage of a business cycle. This eliminates any false creative accounting practices for insider trading and shields and protects the market from being controlled or corrupted. 
No one can corner the currency market:  The currency market is so vast and has so many participants that no single entity, not even a central bank, can control the market price for any extended period of time. Even interventions by mighty central banks are becoming increasingly ineffectual and short lived. Thus, central banks are becoming less and less inclined to manipulate market price. The global market place has changed the foreign currency market dramatically over the last decade.