Nevertheless, invest if you believe it is worth to hold (just DYOR) but keep in mind that there's always a risk since we can't certainly predict what's in the future.
They will just list those coin if they know that there's great demand like those top coins have. But if they are just a token for sure that Binance will ask a lot of requirements and fees just for this token to be listed there. So it really need a community support together with devs willingness for their token to be listed there so that this plan would really happen.
Binance is huge business and they are just trying to make sure that the token they are listing is good which they can get a profit to, also they will not get a problem about turning immediate scam since they might be questioned with that by legal authorities if they let those rampant scamming happened using their platform.
Anyway, Bitcoin is increasing at the moment and alts are following (including RLB). We know it's not new anymore, but still, it is nice seeing the market in this condition again.
We can see it perform so well even if they are few exchange but it would be more better for this token to get listed on binance since they have huge user base and it might get more demands coming from trader there especially if they see that the casino handling it perform so good here. But this is far to happen so for now RLB holders should enjoy what pump they are seeing now and provably more pump will come as bullish season is projected to come.
Bitcoin is increasing a bit at the moment so once it gain a lot of pump on next following months then maybe we can also expect that those tokens which perform good even in bearish season like RLB will also have a good run when bull run season will came.