Ordinarily, a rich gambler have more resources to spend and risk into the gambling games than the poor gamblers but does not imply that they must take more risk, because everything depends on the habit or character of the individual involved. Some poor people are great risk takers and can stake all their earnings in to gambling and when such people lose their money, they are greatly affected by their loses resulting into psychological trauma and depression in some cases.
Some rich people also take risks of injecting some huge amount of money into gambling games but I see many of them taking calculated risks instead. In the sense that when they lose, it probably only affects the profit they had injected into the gambling but not their entire income or worth. They have more options and opportunities to recover faster than the poor people from any lost. So, whether poor or rich is basically an individual decision, but while a poor man will greatly suffer from the lost, the rich might not necessarily feel the same way.
No matter how rich a person is, he or she is just as worried as a poor gambler when he or she loses money that he or she was not prepared to lose. Losing in gambling does not spare anyone, but only you decide how much money you are willing to lose without negatively affecting your financial condition. We have heard more than one story of poor gamblers winning huge sums of money and more than one story of rich gamblers losing entire fortunes. So it all depends on ourselves and our risk management.
Right, if we're talking about gambling then obviously no matter who you are and how rich you are you can end up losing all your money in no time if you treat gambling the wrong way. As you said above that rich or poor will still have the same worries but maybe with different amounts of money, but still I think it's a silly question if someone is asking about who should take a bigger risk between rich and poor gamblers.
At the end of the day the best advice is to take the level of risk that is commensurate or within our means regardless of rich or poor.
I agree with you on the last part of your comment stating that whether we be rich or poor, amount of money we stake on gambling should always be an amount we are able to comfortably lose.
But however, on the first part of your comment, I disagree with you, a rich man wont lose all his money to gambling in no time, except the rich man have a spiritual problem with gambling, for example, somebody like Elon musk sure won't lose all his money to gambling in no time, why?, because it takes owning businesses and having multiple streams of income to become truly rich, this is to say that, if somebody like Elon musk was to start gambling everyday, and possibly losing, it will still take tens of years before he arrives at a stage where we can all say that he has lost everything, and at this, and this is because as he is gambling, his businesses around the world is generating money for him every second, minute, hour, daily, weekly, monthly and so on, if somebody like Elon gambles to the point he return to being broke, I believe you too will not believe that it's something ordinary.