People believe that Ferris wheels in dreams represent a transition or a change. It’s usually up to the individual to figure out what type of change it may be. It can also represent a mental or physical state such as dizziness, or fear.
A common idea is that the Ferris wheel in a dream signifies getting rid of old habits, or removing oneself from one’s comfort zone. This may be to escape from boredom, or to take on a new self.
Another theory is that the Ferris wheel in a dream represents conflict between an individual’s desires and their sense of responsibility. The desire to have fun, for example — which might have been suppressed by responsibilities like work or school — can lead one to feel guilty with themselves because they are not fulfilling their responsibilities.