I would say there is a change in wagering numbers time to time as well, like for example pandemic usually saw digital casinos a lot more wagering than normal, or maybe it is vacation time now and there are less people gambling, there is really not a single method to know what the wagering will be let alone what the variance will be. Only after you figure out what the wagering in the next 2 months will be like you can start to calculate which you can't, but lets say you managed to find the wagering numbers, you would still need to consider ups and downs as well in the winning/losing of the gamblers.

So, I would say best way to invest is to put it there for a year and forget about it, you want longer? Perfect, you want shorter? It is risky. Hence why RHavar is right about putting in there for months/years.