Value and exchange depend on necessity and price.
Examine yourself. What do you have that could be exchanged for what you need but don’t have? What is the value of what you need and, what is the worth of your bargaining power? Put both of them on scales, which of them tips it?
Your net value or net worth is what you have left after a portion has been exchanged for your pressing needs. The higher the positive value of what you have left, the higher your net worth.
Now note, going for only those things you need is critical to increasing the positive value of your net worth. This means that not everything you want is worth the price.