I don't gamble and will not continue it because I cannot think about such habit which is full of risk. I think from very initial stage you have to take interest in your children's take care because once they ramble then advising them is not possible.
One cannot think about future correctly because mind of a person can change anytime, may be he understand the things untimely and left it on time and may be he never understands that how intoxicated it is so he will never think about leaving it in any age.
And it's best if someone can change their thinking as they get older, especially if their children are adults. Perhaps they will see that we are still gambling at our age and advise us to just stop gambling and enjoy our old days well. By stopping gambling, we can avoid many problems that can arise from gambling, and it will also be good for our relationship with our family.
If you are aged and you have money with you after retirement, you can enjoy gambling but if you do not have the money, consider it as your fate and do not argue with your near and dear ones to provide you with finances to gamble.