致富的方式，但是， the odds of success is totally against the majority of investors:
* 是零和游戏（甚至是负和-negative sum game with transaction cost）
* 5%的人赚95%的人的钱（也许5%都不到）
* long learning curve, and you have to be very careful with money/risk management to avoid financial ruin (爆仓）。否则本钱亏完，再有潜力也白搭。
Long Term Capital 就是输在over-leveraging：我想wall street hedge fund managers的心态是冒大险，亏了就关门再开一家。
* The principle of investment in general and futures/commodity investment in particular is against human nature, that's why the majority of investors lose money in any market (real estate 也许是例外）.
但是，如果你有幸成为那5%， that must be one of the best jobs in the world
!
