Psalm 119:72 says, "The law of your mouth is better to me than thousands of gold and silver pieces."
First of all, imagining thousands of gold and silver pieces is staggering. I feel good if there are a few paper bills in my wallet, and I tend to find confidence in such minor things to boast about.
Next, "better" is not just a ranking on paper, but must play itself out in how we order our lives -- or it is not actually "better." If I claim that Coke is better than Pepsi, then given the choice, I must choose Coke to support my statement.
The point is that actually choosing God's law over the riches of this world is the test of truth. I can claim to love God's word, but if I cannot find time in a 24 hour day to open a Bible, my claims are empty. If my career (which is where our modern-day gold and silver come from) is the overriding effort of my entire life, is God's law truly "better"?