At least a month or so. I would invest in an established casino that's been around for a long time and put your money in for at least a couple of months before you consider withdrawal.
We does have a limited option when it comes to casino investments and if you consider the risk factor then i would stay away from it as i would rather gamble and multiply my asset than investing in a casino,because i am having a good time with sports bet for the entire month and winning a good amount with minimal loss and so i am confident to say this at this point in time,it might differ later. 