The number 8 in a dream represents completion. In a dream it means that something is coming to a close, and about to end. A final run up to an ending. It may also reflect feelings of having everything you need.
Example: A woman dreamed of finding a gold 8 shaped object on the ground and picking it up. In waking life she had been exhausting herself taking care of her sick ex-husband and was beginning to consider ending their relationship as a means to take care of own life better. The gold 8 in this case may have reflected her feeling about how valuable it was to her own life to "wrap up" or complete the relationship by ending the friendship with her ex-husband.