He who craves riches, feels fear on their account. No man however enjoys a blessing that brings anxiety, he is always trying to add a little more.
Simply taken, the more you 'need' money or other forms of wealth, the less joy you get from it. Also, having less of what most people crave places you outside of harm of those who are willing to take what you have.
Think about opportunities you and I seek out, and pause for a moment to consider what anxieties, stresses, or fears - should we achieve that goal - might come upon us. Have we considered fully the true cost of that personal or professional goal?