The Diderot Effect states that obtaining a new possession often creates a spiral of consumption which leads you to acquire more new things. As a result, we end up buying things that our previous selves never needed to feel happy or fulfilled.
When you first think about that, it seems cynical, and dark almost. But I don’t see it that way. I see it as a part of being human, recognizing that we can’t just want, and to have our wants become reality. We have to give up some of what we’ve got to get more, whether what we’re seeking is money, power, or just someone to love.