As quality: This card cautions to be careful because of one meaning which is indication of insincerity, unpredictability and deceit. In this sense the person's character is deceptive, the behaviour is unpredictable, the intentions are unclear.
In positive meaning it can sign unpredictable behaviour too, but in this sense the meaning is high degree of autonomy, independence, liberty and freedom. This kind of person has internal control, his/her behaviour is circumstances-independent.
As time signal: the given time is unpredictable; it can be instant but it's conceivable that it will never happen.

Reverse meaning: no reason to worry, the intents are direct and honest, the person's behaviour is predictable.