What I notice is it is increasing and in 2 weeks time you have already grow your investment into a significant amount, if this trend will continue and you will not withdraw from your investment, you might double your money in less than a year.
You should also not completely exclude the possibility that one (or more) of these dice sites may scam or just go bust within the same year, and part of the earnings will be lost in that case if they are reinvested, along with the principal. This is the flip side that we should never forget about. It is still a risky investment by any metric.