$50 a week is not an allocation. You should maintain this leave because it is $200 a month which in some countries can last a family for a month. When you start using more than this amount of money it can make you financially weak. Gambling is very attractive so a person can get addicted to gambling very quickly. And if you get addicted to it then no matter how much profit you make you will not be happy and you will expect something big from it. And gradually you will keep increasing the gambling which will not only harm you financially but also torture you mentally. So your fixed budget should never be more than $50 a week
Money management and discipline are very important for any gambler, but I believe there is no specific amount a person should spend on gambling each week. It’s all individual, because for some people, $50 may represent a quarter of their monthly income, while for others, it might be just a tiny fraction of a percent.