It is possible that Bitcoin could change spending habits. The deflationary nature of Bitcoin means that its value is expected to increase over time. This means that people may be more likely to save Bitcoin rather than spend it.
This could lead to a decrease in consumerism, as people would be less likely to buy things that they do not need. However, it is also possible that people would simply spend their Bitcoin on more expensive items.
Ultimately, the impact of Bitcoin on spending habits is difficult to predict. It will depend on a number of factors, including the price of Bitcoin, the availability of goods and services that can be purchased with Bitcoin, and the cultural attitudes towards Bitcoin.
In your case, it is possible that you would still buy Ray-Ban aviators even if Bitcoin were deflationary. You may feel that the emotional value of the aviators is worth more than the potential increase in the value of Bitcoin.
However, it is also possible that you would be less likely to buy the aviators if you knew that their value would increase over time. You may decide to save your Bitcoin for something else that you value more.
Only time will tell how Bitcoin will impact spending habits. However, it is an interesting question to consider.