There are different kinds of forex funds that you can invest in. You can get a forex managed fund which is a capital account that you setup for a money manager to trade on your behalf. You can also invest in forex hedge funds, if you have the net worth that is.
A forex managed account gives investors the opportunity to participate in the largest financial market in the world without having to trade themselves. A managed forex account enables them to have a professional currency trader to trade their money on their behalf.