He's addicted to ketamine. When that stops working, which it will, he'll either OD or switch to stimulants like Trump and Hitler.
People with antisocial personality disorders tend to not like classical psychedelics as much as they let on. As it tends to be a humbling experience. Which is scary when you think the world revolves around you.
Money is a carrot on a stick. It's not fulfillment.
We find lasting fulfillment and self-worth through our connections with each other. With your kid, with your co-workers. With other people in your life.
Try consciously putting your attention on the things that are actually fulfilling. Money doesn't buy happiness. It does make life easier. But happiness is the time you spend with your kid, not the money you spend on him.