It probably won't make a huge difference at the moment, but it's come up, and may become important in the future...
How do you want to handle the gambling aspect? Not mechanically, or at least not micro-mechanically... I'll trust you to come up with something that's fair and reasonable there. I'm more concerned about the possibility of excess wealth: Granted, there's risks that come along with it, but it still has the potential for some balance problems, and I have no intention of raising those.
One option would just be to make sure there's always a commensurate risk (effectively turning it into encounters with treasure tables as normal), which I'd be okay with, but wouldn't want to talk people into (at least, without them recognizing the risk in the same way.) Or, if you wanted to be totally artificial about it, just deduct it from the treasure I'd otherwise be getting... You lose some versimilitude there, but I'd be fine with it otherwise.
Anyway, I'd normally try to sort this out via email, but since I'm pulling others in

I figured it should be a point of discussion for all involved.