The first card is the Nine of Pentacles. This means that you worked hard in the past and were able to accumulate some wealth. Dreaming of winning the lottery could be a way for you to reflect on what you have already accomplished.
The second card is Wheel of Fortune. This represents your current situation, which shows that you are heading in the right direction. This means that you have the skills to succeed and that your fortunes can change at any moment. The dream can be a sign that you are heading in the right direction.
The last card is the Four of Swords. This indicates that you may have a period of challenges or difficulties in the future. It may be a time when you will have to face trials and overcome them in order to achieve the desired financial prosperity. Again your dream could be a sign that you have the skills to overcome these challenges and achieve your financial goals.
In conclusion, the cards seem to suggest that your dream of winning the lottery could be a sign of luck. If you are willing to take on present and future challenges, you may be able to achieve your desired financial goals. So my answer is: Yes, it can be a sign of luck.