Your dream is rich with symbolism and reflects various aspects of your life, emotions, and experiences. Here’s a breakdown of some key elements:

1. Traveling in Portugal: Travel often represents a journey of self-discovery or exploration of new ideas and emotions. Portugal, specifically, might symbolize a connection to culture or heritage, or perhaps it reflects a desire for adventure or learning.
2. Family and Arguments: The presence of family, particularly conflicts, suggests that you may be navigating complex relationships or feelings within your family. The arguments with the wealthy woman could symbolize feelings of inadequacy or competition, or perhaps it's a reflection of tensions you perceive in your own family dynamics.
3. Illusions and Tragic Moments: The woman's ability to create illusions that depict tragic moments in history might indicate your awareness of the darker aspects of life or societal issues. This could suggest a need to confront or acknowledge these elements rather than avoid them.
4. Toys and Theft: Taking toys, especially ones that you convinced yourself were abandoned, may symbolize a desire to reclaim your childhood innocence or joy. It might also reflect feelings of guilt or anxiety about taking what doesn’t belong to you, indicating a conflict between desire and morality.
5. McDonald’s and Themed Spaces: The visit to McDonald's and the Inside Out theme suggests a craving for comfort and familiarity amidst chaos. Inside Out deals with emotions, which might indicate your current emotional state and the importance of processing feelings.
6. Store and Snacks: Encountering the "De Montão" snack and new versions reflects nostalgia and possibly a desire for novelty or change. It might represent missed opportunities or the frustration of not being able to obtain what you want.
7. Locker Room Experience: The locker room scenario indicates a confrontation with personal identity and boundaries. The discomfort about going into the women's locker room might symbolize feelings of confusion about societal roles or expectations.
8. Disguise as Steven Universe: Dressing as a character like Steven Universe, who embodies kindness and acceptance, points to a desire to mediate or resolve conflicts. It reflects your wish to bring harmony to situations or your ability to adapt to different scenarios.

In summary, this dream seems to encapsulate themes of family dynamics, personal identity, nostalgia, and the quest for emotional balance. It might be helpful to reflect on your current relationships and feelings, particularly around family, and consider how you can navigate any tensions or desires for connection in your waking life.