My Husband Will Not Stop Losing All Our Money At The Casino, What Should I Do?

My parents had to pay someone at the bank to budget their money after filing bankruptcy. They met with that person and discussed all bills and paid for the needs first. After that the bank rationed out money in savings that neither party could spend without first discussing it. It was hard to get money for wants, and they were put them on a spending allowance for wants so once it was spent it was hard to get more. They also had counseling. You may need to take it to court and be the person deemed in charge of the money decisions as if he is elderly and can't do for himself. I do wish you the best.

It sounds as if he has a addiction and should seek help for the problem,discuss this issue with him and see how he feels about giving up this habit, and go from there with your decision, this habit allows you to have nothing and gains nothing in life as that of investing does...wish you good luck

I think you meant to say our money instead of are money.
You make it sound like this is a sudden development but I doubt that it is.
750,000.  Was that $750,000 or 750,000 of something else?  If it was $750,000 that would be awful to me.  I would feel betrayed if my spouse did that without my consent.
You can't get the money back but you can protect yourself so that the money you earn in the future and your other present assets are not endangered.  A divorce is usually required. Contact an attorney.

If there is a gambling problem in your home, the Gam-Anon family group may be able to help you cope with it, especially if you are living with a compulsive gambler.  Literature, answers and information can be there (gam-anon.org).  You probably should also contact an attorney, and go speak with them and find out what other options you may have, and what is the best way that the majority of family members living with a compulsive gambler deal with the situation.
I do truly wish that are able to find a solution to this, and will keep you in my prayers.
Moe