Let us first say good things about this man. He is a model citizen, a promise keeper and a truth seeker. He does not use his wealth to oppress the poor. He does not squander his money on worldly trinkets or immoral pursuits. And it is not exactly money that is his addiction.
Addictions are usually destructive.
On a certain level, they are irrational, they make no sense. But money, in and of itself, is not necessarily destructive, irrational or insane - in fact, a steady cash flow can help to produce good fruits throughout the world. In the first century, most people believed that wealth made possible the performance of religious duties. When we find ourselves powerless over drugs or alcohol, it is in our best interest to get rid of the addiction. But for the rich man to sell everything he owns and give to the poor - that is irrational.