Liquidity

It offers opportunities for traders and the potential for a large purchase or sale so as to potential profit at any time

In the Forex market there is always a buyer and a seller

FOREX absorbs trading volumes and per trade sizes which dwarfs the capacity of any other market

On the simplest level, liquidity is a powerful attraction for any investor as it suggests the freedom to open or close a position at will 24 hours 5 day.

Once purchased, many other high yield investments are difficult to sell at will. Traders never have to worry about being "stuck" in a position because of a lack of market interest.