Actually 3.105 bilion total supply right now. If you want the exact number of it, you can get that from the RLB dashboard on the rollbit's site. Honestly this shock me as well but the marketcap is actually pretty high right now and my honest opinion on this is that, this is definitely a good casino based token but there are alot of hype and fomo on it therefore the price is rising pretty quick every time Rollbit released a new update / teaser of RLB use case
Well just ride the wave though

With the on going altcoin season, $RLB coin will bounce soon if not make its new all time high.
Price chart on Coinmarketcap gives me thinking that if you are not degen and don't want to take too big risk, you can wait for a while and wait for deep corrections to buy the token.
I am not say the token won't be able to make its new all time high but depends on your taste, like risk, accept risk or prioritize safety, you will have different decision. I will wait for the token dips to somewhere from $0.12 to $0.16 to buy it. $0.12 is a safer entry but it might not be seen in this altcoin season so I am more realistic with $0.16 as my entry.