What happens after the last PoW block??
With ICB, you don't have to wait for pow stop to stake.Pow and Pos cowork forever (near 200 years).
ICB is a scrypt coin; however it has advance features that don't like most of other scrypt coins. It's rather hard to mine ICB. Block reward is 10 ICB/min. We can see that when we check mining info from wallet, it shows that ICB is attracting many miner to mine ICB continously from the time source code was released. There has been more than 30.000 blocks passed however there're only about 150.000 ICB created more. That means mining just reaches about 50% effectiveness or about 5 ICB/min is being mined by POW. All fund for ICO still be locked in cold wallet that means staking is not really joining minting new coins. When finishing ICO, most of ICB supply are released for holders to stake, PoW miners will even hard to earn 1 ICB/min. At that time, miners could choose to continue mining or not based on ICB price and mining profit.
Anyway, there's always POW existence to support a strong ICB network (POS only scrypt coins are known to suffered severed security problems, especially when their networks are not matured enough).
Pioneer88 had a clever calculation on PoW reward and PoS interest which will encourage both miners and stakers then lead to achieve a stable ICB price at its highest possible level.