If you dreamed about a very big black snake: In financial matters, you need to act carefully, Some of your ideas may provide you with extra income. To see a very big black snake in a dream indicates a strong and dangerous enemy. This means that there is someone around you who is ready to harm you, who does not think about anyone but himself. It corresponds to the fact that the person who sees a big and black snake should be cautious and take firm steps in his work.