Why do you often dream of visions in the sky?

This is hard to say. Even Freud's dream interpretation theory, which is very famous by psychologists, has not been accepted by real science.

Thirdly, it needs to be emphasized that dreams are not to predict the future, but to learn more about themselves.

I think you often dream of visions in the sky because you are curious or afraid in this respect. Too much curiosity or too much fear will bring us attention and sensitivity to a certain problem.

This seemingly latent emotion (curiosity or fear) may be caused by events that you directly or indirectly come into contact with from birth to growth. This kind of event is forgotten in your subconscious, so you can often form dreams to remind you of this kind of event.

Dreams are always related to the subconscious. Subconsciously, there are all the memories you spent in the Spring and Autumn Period, and there are also unreal memories you imagined (such memories account for a large part). We say that we can't easily believe what our eyes see, and we can't easily believe that what our minds remember must be true.

You often dream of visions in the sky, and your constant stimulation has formed a psychological suggestion effect on yourself. So you believe that this kind of thing must have a moral.

I can't draw a conclusion, and the reason is even harder to find. Sometimes the subconscious mind is guiding us to seek advantages and avoid disadvantages (people have the instinct to seek advantages and avoid disadvantages), so many so-called sixth senses are very accurate, but in fact, our subconscious mind is doing a deep understanding of ourselves, and it will explore our own behaviors of seeking advantages and avoiding disadvantages based on all the memories in our lives. My suggestion is, when you encounter things related to your dreams, you should pay more attention and judge more!