The tarots chosen to analyze this question are the Two of Cups, the Six of Cups and the Eight of Wands reversed. The Two of Cups represents the nature of the situation, suggesting a feeling of joy and happiness, as if you were experiencing a special moment. It also symbolizes some kind of "mysterious charm" or magical experience that can be associated with a good luck sign. The Six of Cups indicates that this sign could lead to a promising start, where all wishes can come true. Finally, the reversed Eight of Wands can symbolize a lack of confidence in the situation or in one's ability to get lucky.
The Two of Cups indicates that the emotions associated with the dream experience are pleasurable and that there is a feeling of magic and mystery. This could be due to the fact that the dreamed experience represents a positive sign or a message indicating a lucky time. The Six of Cups suggests that this signal can be the push needed to start something important and positive, and that it can lead to a promising start. The reversed Eight of Wands may indicate that you need to look confidently towards the situation and believe this signal.
The Two of Cups suggests that the dreamed experience can be interpreted as a positive sign or a message indicating good luck. The Six of Cups suggests that this signal could be the beginning of something promising and positive, while the reversed Eight of Wands suggests that it is necessary to look towards the situation with confidence and believe in this signal.
Based on the aspects analyzed with respect to the chosen tarot cards, it is probable to say that the dream in which you win the lottery is a positive sign and a message from destiny that will indicate a lucky period. However, it is important to remember that you need to look at the situation with confidence and believe in this signal in order to really benefit from it. Therefore, the answer to the question is Yes, it seems probable that the dream in which you win the lottery is a positive and significant sign.