If money could guarantee someone peace of mind, then the man in person would've spent half of what he's acquired to find peace but what we was going through was beyond his wealth, and he's a prove that one can have all the billions and still not get peace or happiness. I might be wrong though but what's your opinion?
You are right but it is better to be rich than to be poor. The reason is that you can also read many news about people that are not rich but killed themselves so are the news of rich people doing so sometimes. I think the poor killed themselves than the rich people because the poor are more than the rich. Money may give people some ways to happiness but there are some things like sickness or bad health and other things that can make it not happen. But the poor can suffer those also.
I have gone through poverty and I can attest that poverty can lead to suicide more than riches. A hungry man will more easily commit suicide than a rich man. Many poor sick people will willing to commit suicide if they have the opportunity. If a poor man commits suicide it doesn't receive news headlines like the rich so it is common to see such discussion having wide coverage.
Most of the rich people who commit suicide don't commit it because they are wealthy but they have other reasons. Some of them are going through serious health or psychological problems. Others are in debt and don't have the means to repay. We just assume that they are wealthy while these people are even poorer than us because of the amount of debt they owe. Let me add that some of the suicides of these rich people are pre-planned murders. Suicide is used to cover the criminal act.