the deceased might be indebted to someone who's aggressively asking him to repay. A businessman should be able to withstand gambling threats, though the correlation between gambling and suicide is not completely clear, as many factors lead to suicide. Depression, anxiety, hopelessness etc, these things can be generated via gambling, and multiple factors like heartbreaks, loss of a loved one, or a collapse of business. However, the blame immediately goes to gambling in most people's lives. The deceased may have been a compulsive gambler, whose ill gambling behavior attracted the attention of the society. His business may have suffered a series of losses and he'd be bittered to lose out more money in gambling. Anxiety harms the body by causing the amygdala to increase and get intensified by threatening situations. And also affects his memory, the deceased would be forced to engage in a decision, that he doesn't understand or have direct control over. In gambling, we must avoid the anxiety caused by too many losses.
That is usually what happens, unfortunately most people do end up playing with money that they do not have, I have seen a guy who sold a house for someone else, it wasn't his house, it was someone who lived in another nation and invested to a house and wanted to sell, and this person was not a real estate person but like some family member who lived in that nation, after selling the house until the real owner came in and took the money, he wanted to gamble and double the money, and he lost it all and then took his own life as well.
Many people end up gambling with others money and then they take their own life, not that it solves any of the issues, money is still gone, so them taking their life doesn't change a single thing. I believe that these people need to learn that gambling with money that you can't lose is not something you should be doing, it's such a simple concept and they must be aware of it and for some reason they still keep doing it, no idea why.